Use the right env syntax

Author: pcolby

.github/workflows/build.yaml

@@ -497,7 +497,6 @@ jobs:
       - name: Install LCOV
         if: matrix.toolchain != 'msvc'
         run: pacman --sync --noconfirm --verbose mingw-w64-x86_64-lcov
-      - run: dir C:\msys64\ /s
       #- run: C:\msys64\mingw64\bin\lcov --version
       #- run: lcov --version
       - run: lcov --version
@@ -586,6 +585,10 @@ jobs:
         working-directory: ${{ runner.temp }}
       - name: Collate test coverage
         if: matrix.toolchain != 'msvc'
+        run: cmake --build "%RUNNER_TEMP%" --target coverage --verbose
+      - name: Collate test coverage
+        if: matrix.toolchain != 'msvc'
+        shell: bash
         run: cmake --build "$RUNNER_TEMP" --target coverage --verbose
       - name: Upload test results
         if: matrix.arch != 'arm64' && fromJSON(steps.post-build.outputs.tap)