ops: refactor github -> gitea

.gitea/workflows/ci.yml

@@ -60,7 +60,7 @@ jobs:
           docker run \
             --rm \
             --workdir /builder/mnt \
-            -v ${{ github.workspace }}:/builder/mnt \
+            -v ${{ gitea.workspace }}:/builder/mnt \
             cproject-builder:latest \
             /bin/bash -c "rm -rf build; cmake -B build; cmake --build build"
       -
@@ -69,23 +69,23 @@ jobs:
           docker run \
             --rm \
             --workdir /builder/mnt/tests/unittest \
-            -v ${{ github.workspace }}:/builder/mnt \
+            -v ${{ gitea.workspace }}:/builder/mnt \
             cproject-builder:latest \
             /bin/bash -c "ceedling clobber; ceedling gcov:all; ceedling utils:gcov"
       -
         name: Archive coverage results
         shell: bash
         run: |
-          staging="reports-${{github.run_number}}"
+          staging="reports-${{gitea.run_number}}"
           mkdir -p "$staging"
           cp -r tests/unittest/build/artifacts/gcov "$staging"
           tar czf "$staging.tar.gz" "$staging"
-          echo "ASSET=$staging.tar.gz" >> $GITHUB_ENV
+          echo "ASSET=$staging.tar.gz" >> $GITEA_ENV
       -
         name: Archive artifacts
         uses: actions/upload-artifact@v3
         with:
-          name: reports-${{github.run_number}}
+          name: reports-${{gitea.run_number}}
           path: ${{ env.ASSET }}
           retention-days: 3