Auto merge of #27883 - servo:dependabot/cargo/gfx-backend-vulkan-0.6.5, r=jdm

Bump gfx-backend-vulkan from 0.6.1 to 0.6.5

Bumps [gfx-backend-vulkan](https://github.com/gfx-rs/gfx) from 0.6.1 to 0.6.5.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/gfx-rs/gfx/blob/master/CHANGELOG.md">gfx-backend-vulkan's changelog</a>.</em></p>
<blockquote>
<h3>backend-vulkan-0.6.5 (15-10-2020)</h3>
<ul>
<li>support different types of descriptors in a single <code>DescriptorSetWrite</code></li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li>See full diff in <a href="https://github.com/gfx-rs/gfx/commits">compare view</a></li>
</ul>
</details>
<br />

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Cargo.lock

@@ -2101,9 +2101,9 @@ dependencies = [
 
 [[package]]
 name = "gfx-backend-vulkan"
-version = "0.6.1"
+version = "0.6.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a84bda4200a82e1912d575801e2bb76ae19c6256359afbc0adfbbaec02fcadc6"
+checksum = "3a3a63cf61067a09b7d1ac480af3cb2ae0c5ede5bed294607bbd814cb1666c45"
 dependencies = [
  "arrayvec 0.5.1",
  "ash",