chore(CI): Adjust testing matrix for Nextcloud 29 on master

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

.github/workflows/phpunit-pgsql.yml

@@ -39,7 +39,7 @@ jobs:
     strategy:
       matrix:
         php-versions: ['8.0']
-        server-versions: ['master']
+        server-versions: ['master', 'stable29']
 
     services:
       postgres:

.github/workflows/psalm.yml

@@ -24,7 +24,7 @@ jobs:
       # do not stop on another job's failure
       fail-fast: false
       matrix:
-        ocp-version: [ 'dev-master', 'dev-stable27', 'dev-stable26' ]
+        ocp-version: [ 'dev-master', 'dev-stable29', 'dev-stable28', 'dev-stable27', 'dev-stable26' ]
 
     name: Nextcloud
     steps: