Revert to 8.0.3 and clear ccache

Author: sudara

.github/workflows/build.yaml

@@ -88,7 +88,7 @@ jobs:
       - name: ccache
         uses: hendrikmuhs/ccache-action@v1.2
         with:
-          key: v2-${{ matrix.name }}-${{ env.BUILD_TYPE }}
+          key: v3-${{ matrix.name }}-${{ env.BUILD_TYPE }}
 
       - name: Configure
         shell: bash