chore(CI): Adjust testing matrix for Nextcloud 27 on stable27

Signed-off-by: Joas Schilling <coding@schilljs.com>

.github/workflows/cypress.yml

@@ -23,7 +23,7 @@ jobs:
         # containers: [1, 2, 3]
         php-versions: [ '8.0' ]
         databases: [ 'sqlite' ]
-        server-versions: [ 'master' ]
+        server-versions: [ 'stable27' ]
 
     steps:
       - name: Use Node.js ${{ matrix.node-version }}

.github/workflows/integration.yml

@@ -28,7 +28,7 @@ jobs:
       matrix:
         php-versions: ['8.1']
         databases: ['sqlite', 'mysql', 'pgsql']
-        server-versions: ['master']
+        server-versions: ['stable27']
 
     name: php${{ matrix.php-versions }}-${{ matrix.databases }}-${{ matrix.server-versions }}
 
@@ -151,4 +151,4 @@ jobs:
                 repo: context.repo.repo,
                 body: comment
               })
-            }
+            }

.github/workflows/phpunit.yml

@@ -28,7 +28,7 @@ jobs:
       matrix:
         php-versions: ['8.0', '8.1']
         databases: ['sqlite', 'mysql', 'pgsql']
-        server-versions: ['master']
+        server-versions: ['stable27']
 
     name: php${{ matrix.php-versions }}-${{ matrix.databases }}-${{ matrix.server-versions }}