[CI] undo silly things and try more sensible stuff

.gitea/workflows/build.yml

@@ -60,11 +60,8 @@ jobs:
           echo ::set-output name=display-name::${DISPLAY_NAME}
       - name: Checkout
         uses: actions/checkout@v3
-        env:
-          cache-name: cache-zephyr-modules
-          test: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('manifest-dir/west.yml') }}
       - name: Cache west modules
-        uses: actions/cache@v3
+        uses: actions/cache@v2
         env:
           cache-name: cache-zephyr-modules
         with: