chore(CI): Adjust testing matrix for Nextcloud 29 on stable29

Signed-off-by: Joas Schilling <[email protected]>

Author: nickvergessen

composer.json

@@ -6,7 +6,7 @@
 		"symfony/event-dispatcher": "^5.3.11",
 		"psalm/phar": "^5.9",
 		"nextcloud/coding-standard": "^1.0",
-		"nextcloud/ocp": "dev-master"
+		"nextcloud/ocp": "dev-stable29"
 	},
 	"require": {
 		"php-parallel-lint/php-parallel-lint": "^1.2"