ci(meson): switch coverage upload to official coverallsapp action (#1708) * ci(meson): switch coverage upload to official coverallsapp action Fixes the meson coverage job failure caused by an HTTP 400 response from Coveralls due to invalid service_name formatting in gcovr-action. Switches the workflow to generate a local coveralls.json file with gcovr-action and submit it using the official coverallsapp/github-action@v2. * ci(meson): pin coverallsapp/github-action to commit SHA

diff --git a/.github/workflows/meson.yml b/.github/workflows/meson.yml
index cacfc21..2860c9d 100644
--- a/.github/workflows/meson.yml
+++ b/.github/workflows/meson.yml

@@ -68,5 +68,9 @@
       - name: generate code coverage report
         uses: threeal/gcovr-action@v1.0.0
         with:
-          coveralls-send: true
-          github-token: ${{ secrets.GITHUB_TOKEN }}
+          coveralls-out: coveralls.json
+
+      - name: upload code coverage to Coveralls
+        uses: coverallsapp/github-action@8d6379e14d29928660c4ba802d8e85393440b329 # v2.3.8
+        with:
+          file: coveralls.json