Fixes update windows base image tag files in other repos

[jaxesn]

Issue #, if available:

Description of changes:

We got our first windows base image update yesterday. The code used to update the tag files in other repos, like eks-distro, was only looking at the al2 block of #768. This fixes this to look at both al2 and windows.

Once this is merged, i am going to rerun https://prow.eks.amazonaws.com/view/s3/prowdataclusterstack-316434458-prowbucket7c73355c-1n9f9v93wpjcm/logs/eks-distro-base-tag-files-update-postsubmit/1613510023281905664 to ensure it properly opens the PR in eks-distro.

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