Merge pull request #445: .github: replace recently seen logic

I was failing to make this work because I as modifying the wrong version of the `git-update-git-for-windows` file.

I'm still struggling to show that this works when run from the task scheduler (after installing a lower version and replacing the script in one place), but it works when I manually run the script that is generated by this installer.

.github/workflows/build-git-installers.yml

@@ -206,15 +206,10 @@ jobs:
         run: |
           set -x
 
-          b=/usr/src/build-extra &&
-          str="recently_seen=.*\$" &&
-
-          echo $b/git-extra/git-update-git-for-windows &&
-          cat $b/git-extra/git-update-git-for-windows &&
+          b=/mingw64/bin &&
 
-          sed -i -e '/^# when confirmation to do so is given./a\
-            use_recently_seen=no' \
-            $b/git-extra/git-update-git-for-windows
+          sed -i -e '6 a use_recently_seen=no' \
+            $b/git-update-git-for-windows
       - name: Set the installer Publisher to the Git Fundamentals team
         shell: bash
         run: |