[tests only] Attempt to get actions/cache working again [skip ci] (ddev#4663)

Author: rfay

.github/workflows/master-build.yml

@@ -101,7 +101,8 @@ jobs:
       - name: Cache signed binaries
         # After 3.0.5 they were using zstdmt which is not available on Windows
         # See https://github.com/actions/cache/issues/891
-        uses: actions/cache@v3.0.11
+        # But trying again with @v3, 2023-02-18
+        uses: actions/cache@v3
         with:
           path: .gotmp/bin/windows_amd64
           key: ${{ github.sha }}-${{ github.ref }}-signed-windows-binaries