do coverage testing only on ubuntu

.github/workflows/ci.yml

@@ -48,21 +48,31 @@ jobs:
           show-versioninfo: true
       - uses: julia-actions/cache@v2
 
-      - name: Run tests
+      - name: Run tests without coverage
+        if: ${{ matrix.os != 'ubuntu-latest' }}
+        uses: julia-actions/julia-runtest@v1
+        with:
+          coverage: false
+
+      - name: Run tests with coverage
+        if: ${{ matrix.os == 'ubuntu-latest' }}
         uses: julia-actions/julia-runtest@v1
         with:
           coverage: true
 
       - name: Process Julia coverage data
+        if: ${{ matrix.os == 'ubuntu-latest' }}
         uses: julia-actions/julia-processcoverage@v1
 
       - name: Upload coverage data (Codecov)
+        if: ${{ matrix.os == 'ubuntu-latest' }}
         uses: codecov/codecov-action@v4
         with:
           files: lcov.info
           token: ${{ secrets.CODECOV_TOKEN }}
 
       - name: Upload coverage data (Coveralls)
+        if: ${{ matrix.os == 'ubuntu-latest' }}
         uses: coverallsapp/github-action@v2
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}