fix missing branch

Author: eeliu

.github/workflows/main.yml

@@ -2,6 +2,10 @@ name: Build
 
 on: [push, pull_request, workflow_dispatch]
 
+env:
+  PINPOINT_C_AGENT_BRANCH: 0.7
+
+
 jobs:
   PHPUnit:
     runs-on: ubuntu-latest
@@ -15,7 +19,7 @@ jobs:
         with:
           php-version: ${{ matrix.php-versions }}
           tools: composer:v2
-          extensions: pinpoint_php-https://github.com/pinpoint-apm/pinpoint-c-agent@dev
+          extensions: pinpoint_php-https://github.com/pinpoint-apm/pinpoint-c-agent@${{ env.PINPOINT_C_AGENT_BRANCH }}
       - run: |
           composer install --prefer-dist
           vendor/bin/phpunit --configuration PHPUnit.xml --testsuit pinpoint --testdox
@@ -43,7 +47,7 @@ jobs:
         with:
           php-version: ${{ matrix.php-versions }}
           tools: composer:v2
-          extensions: pinpoint_php-https://github.com/pinpoint-apm/pinpoint-c-agent@dev, mongodb-mongodb/[email protected]
+          extensions: pinpoint_php-https://github.com/pinpoint-apm/pinpoint-c-agent@${{ env.PINPOINT_C_AGENT_BRANCH }}, mongodb-mongodb/[email protected]
       - run: |
           composer install --prefer-dist
           vendor/bin/phpunit --configuration PHPUnit_aop_libraries.xml --testsuit pinpoint --testdox