Attempt build number fix for Win

Author: Motobug

.github/workflows/ci.yml

@@ -175,6 +175,13 @@ jobs:
     - uses: actions/checkout@v2
     - name: Setup Submodules
       run: git config --global --add safe.directory . && git submodule update --init --recursive
+    - name: Dolphin-Build Number
+      run: |
+          export LASTCOMMIT=$(git log --pretty=format:%H -1)
+          export DOLPHINVER="v3.1.2-mainline-beta.3"
+          echo "DOLPHIN Build $DOLPHINVER"
+          echo "DOLPHINVER=$DOLPHINVER" >> $GITHUB_ENV
+          get-content Source/Core/Common/scmrev.h.in | %{$_ -replace "s|\${DOLPHIN_WC_DESCRIBE}","$DOLPHINVER"}
     - name: Setup MSBuild
       uses: microsoft/[email protected]
       with: