Auto merge of #18629 - qdot:update-windows-readme-python-version, r=jdm

Update link to Windows Python Version in README

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The README currently points to a 2 year old version python for windows (2.7.11). While this version works for servo development, builds also work with the current version (2.7.14), so the link can be updated.

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README.md

@@ -96,7 +96,7 @@ sudo emerge net-misc/curl media-libs/freeglut \
 ```
 #### On Windows (MSVC)
 
-1. Install Python for Windows (https://www.python.org/downloads/release/python-2711/). The Windows x86-64 MSI installer is fine.
+1. Install Python for Windows (https://www.python.org/downloads/release/python-2714/). The Windows x86-64 MSI installer is fine.
 You should change the installation to install the "Add python.exe to Path" feature.
 
 2. Install virtualenv.