ci: run coverty scan on push to master

Signed-off-by: Ihor Solodrai <ihor.solodrai@pm.me>

.github/workflows/coverity.yml

@@ -1,19 +1,23 @@
 name: libbpf-ci-coverity
 
 on:
+  push:
+    branches:
+      - master
   schedule:
     - cron:  '0 18 * * *'
 
-
 jobs:
   coverity:
     runs-on: ubuntu-latest
-    if: github.repository == 'libbpf/libbpf'
     name: Coverity
+    env:
+      COVERITY_SCAN_TOKEN: ${{ secrets.COVERITY_SCAN_TOKEN }}
     steps:
       - uses: actions/checkout@v4
       - uses: ./.github/actions/setup
       - name: Run coverity
+        if: ${{ env.COVERITY_SCAN_TOKEN }}
         run: |
           source /tmp/ci_setup
           export COVERITY_SCAN_NOTIFICATION_EMAIL="${AUTHOR_EMAIL}"
@@ -21,7 +25,6 @@ jobs:
           export TRAVIS_BRANCH=${COVERITY_SCAN_BRANCH_PATTERN}
           scripts/coverity.sh
         env:
-          COVERITY_SCAN_TOKEN: ${{ secrets.COVERITY_SCAN_TOKEN }}
           COVERITY_SCAN_PROJECT_NAME: libbpf
           COVERITY_SCAN_BUILD_COMMAND_PREPEND: 'cd src/'
           COVERITY_SCAN_BUILD_COMMAND: 'make'