Add phpstan key to trusted list

Author: sebastianfeldmann

.github/workflows/integration.yml

@@ -42,7 +42,7 @@ jobs:
       run: composer install --prefer-dist --no-progress --no-suggest
 
     - name: Install tooling
-      run: GITHUB_AUTH_TOKEN=${{ secrets.GITHUB_TOKEN }} tools/phive --no-progress --home ./.phive install --force-accept-unsigned --trust-gpg-keys 4AA394086372C20A,31C7E470E2138192,8E730BA25823D8B5,CF1A108D0E7AE720,2DF45277AEF09A2F
+      run: GITHUB_AUTH_TOKEN=${{ secrets.GITHUB_TOKEN }} tools/phive --no-progress --home ./.phive install --force-accept-unsigned --trust-gpg-keys 4AA394086372C20A,31C7E470E2138192,8E730BA25823D8B5,CF1A108D0E7AE720,2DF45277AEF09A2F,51C67305FFC2E5C0
 
     - name: Execute unit tests
       run: tools/phpunit --no-coverage --testsuite UnitTests