[llvm] [CI][Github] Version pin packages in windows container (PR #148319)

[via llvm-commits]

================
@@ -39,11 +39,13 @@ RUN regsvr32 /S "C:\BuildTools\DIA SDK\bin\amd64\msdia140.dll" & \
 
 # install tools as described in https://llvm.org/docs/GettingStartedVS.html
 # and a few more that were not documented...
-RUN choco install -y ninja git sccache
 # Pin an older version of Python; the current Python 3.10 fails when
 # doing "pip install" for the other dependencies, as it fails to find libxml
 # while compiling some package.
----------------
cmtice wrote:

I meant you should update the comment to explain why we're pinning the other packages as well. Currently the comment says (paraphrased) "we're pinning Python" and then we proceed to pin not only Python and but 3 other packages, with no explanation or mention of the other three.

https://github.com/llvm/llvm-project/pull/148319