Attempt to run docker in github actions with correct user and group permissions

.github/workflows/build.yml

@@ -27,6 +27,7 @@ jobs:
       - name: Run Rust Tests
         run: |
           docker run --rm \
+            -u $(id -u):$(id -g) \
             -v "$PWD":/app \
             slang-builder \
             cargo test --manifest-path rust_compiler/Cargo.toml --workspace --all-targets
@@ -48,6 +49,7 @@ jobs:
       - name: Build Release Artifacts
         run: |
           docker run --rm \
+          -u $(id -u):$(id -g) \
             -v "$PWD":/app \
             -v "/home/github-runner/permanent-refs":/app/csharp_mod/refs \
             slang-builder \