Update actions/checkout in GitHub Actions workflows to v3

Signed-off-by: Dirk Stolle <striezel-dev@web.de>

.github/workflows/docs.yml

@@ -10,7 +10,7 @@ jobs:
     name: Upload docs to GitHub Pages
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: 2
       - name: Bootstrap

.github/workflows/main.yml

@@ -20,7 +20,7 @@ jobs:
       - name: Branch check
         if: ${{ !contains('refs/heads/auto refs/heads/try refs/heads/try-windows', github.ref) }}
         run: exit 0
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: 2
       - name: Copy to C drive
@@ -47,7 +47,7 @@ jobs:
       - name: Branch check
         if: ${{ !contains('refs/heads/auto refs/heads/try refs/heads/try-windows', github.ref) }}
         run: exit 0
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: 2
       - name: Copy to C drive
@@ -75,7 +75,7 @@ jobs:
       - name: Branch check
         if: ${{ !contains('refs/heads/auto refs/heads/try refs/heads/try-windows', github.ref) }}
         run: exit 0
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: 2
       - name: Copy to C drive
@@ -101,7 +101,7 @@ jobs:
       - name: Branch check
         if: ${{ !contains('refs/heads/auto refs/heads/try refs/heads/try-mac', github.ref) }}
         run: exit 0
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: 2
       # TODO: Remove this step when the compatibility issue between mozjs and
@@ -153,7 +153,7 @@ jobs:
   #     matrix:
   #       chunk_id: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20]
   #   steps:
-  #     - uses: actions/checkout@v2
+  #     - uses: actions/checkout@v3
   #       with:
   #         fetch-depth: 2
   #
@@ -205,7 +205,7 @@ jobs:
       - name: Branch check
         if: ${{ !contains('refs/heads/auto refs/heads/try refs/heads/try-linux refs/heads/try-wpt', github.ref) }}
         run: exit 0
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: 2
       - name: Bootstrap
@@ -241,7 +241,7 @@ jobs:
       - name: Branch check
         if: ${{ !contains('refs/heads/auto refs/heads/try refs/heads/try-wpt', github.ref) }}
         run: exit 0
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: 2
       - uses: actions/download-artifact@v2

.github/workflows/nightly-rust.yml

@@ -15,7 +15,7 @@ jobs:
     name: Build (Linux) + rustc nightly
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: 2
       - name: Update rustc

.github/workflows/nightly.yml

@@ -15,7 +15,7 @@ jobs:
     name: Upload nightly (Linux)
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: 2
       - name: Bootstrap
@@ -36,7 +36,7 @@ jobs:
     name: Upload nightly (macOS)
     runs-on: macos-12
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: 2
       # TODO: Remove this step when the compatibility issue between mozjs and
@@ -77,7 +77,7 @@ jobs:
     name: Upload nightly (Windows)
     runs-on: windows-2019
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: 2
       - name: Copy to C drive
@@ -116,7 +116,7 @@ jobs:
     name: Upload nightly (UWP)
     runs-on: windows-2019
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: 2
       - name: Copy to C drive

.github/workflows/pull-request.yml

@@ -12,7 +12,7 @@ jobs:
     name: Build (Linux)
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: 2
       - name: Bootstrap

.github/workflows/wpt-nightly.yml

@@ -13,7 +13,7 @@ jobs:
     name: Build on Linux
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: 2
       - name: Bootstrap
@@ -45,7 +45,7 @@ jobs:
       matrix:
         chunk_id: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: 2
       - uses: actions/download-artifact@v2
@@ -91,7 +91,7 @@ jobs:
       - "linux-wpt"
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           fetch-depth: 2
       # Download all artifacts