Don't fail job if coverage fails (#163)

Use `continue-on-error: true` to avoid grcov issues failing CI jobs

Author: andrewdavidmackenzie

.github/workflows/clippy_build_test.yml

@@ -83,6 +83,7 @@ jobs:
 
       - name: UploadCoverage
         if: matrix.rust == 'stable'
+        continue-on-error: true
         run: |
           grcov . --binary-path target/debug/ -s . -t lcov --branch --ignore-not-existing --ignore "/*" -o coverage.info
           lcov --remove coverage.info lcov --ignore-errors unused '/Applications/*' 'target/debug/build/**' 'target/release/build/**' '/usr*' '**/errors.rs' '**/build.rs' 'examples/**' '*tests/*' -o coverage.info