ci: Use ~ instead of $HOME. (#4)

Author: varungandhi-src

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Mount bazel cache
         uses: actions/cache@v3
         with:
-          path: "$HOME/.cache/bazel"
+          path: ~/.cache/bazel
           key: bazel
       - name: Run tests
         run: ./bazel test --test_output=errors //test/scip --config=dbg