[CI] Pinning CCache Base Directory

Author: AlexandreSinger

.github/workflows/test.yml

@@ -669,6 +669,8 @@ jobs:
     - uses: hendrikmuhs/ccache-action@v1.2
       with:
         key: ${{ github.job }}-gcc-11
+        ccache-config: |
+          base_dir = ${{ github.workspace }}
 
     - name: Build
       env: