chore: Remove useless matrix from phpunit-32bits

Only PHP 8.4 is tested because we use our own image

Signed-off-by: Côme Chilliet <come.chilliet@nextcloud.com>

Author: come-nc

.github/workflows/phpunit-32bits.yml

@@ -29,8 +29,6 @@ jobs:
 
     strategy:
       fail-fast: false
-      matrix:
-        php-versions: ['8.3', '8,5']
 
     steps:
       - name: Checkout server