WIP: use fixed server branch

Signed-off-by: skjnldsv <skjnldsv@protonmail.com>

Author: skjnldsv

.github/workflows/cypress-e2e.yml

@@ -30,7 +30,7 @@ jobs:
         uses: actions/checkout@v4.1.1
         with:
           repository: nextcloud/server
-          ref: ${{ matrix.server-versions }}
+          ref: fix/headers-lifecycle
           submodules: true
 
       - name: Checkout viewer