[GitHub Actions] Restore Codecov

.github/workflows/xcodebuild.yml

@@ -42,7 +42,7 @@ jobs:
       - name: watchOS Simulator
         run: xcodebuild ${{ matrix.xcode_flags_for_build_only }} -sdk watchsimulator | xcpretty
         shell: bash
-      # - name: Codecov
-      #   if: matrix.xcode_version == '10.3'
-      #   run: curl -s https://codecov.io/bash | bash -s -- -t ${{ secrets.CODECOV_TOKEN }}
-      #   shell: bash
+      - name: Codecov
+        if: matrix.xcode_version == '12'
+        run: curl -s https://codecov.io/bash | bash -s -- -t ${{ secrets.CODECOV_TOKEN }}
+        shell: bash