Replace 9.1.x branch with 9.1.4 tag in CI

Author: jolelievre

.github/workflows/php.yml

@@ -121,7 +121,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        presta_version: ['9.1.x', '9.2.x', 'develop']
+        presta_version: ['9.1.4', '9.2.x', 'develop']
         php_version: ['8.1', '8.5']
       fail-fast: false
     env:

.github/workflows/ui-test.yml

@@ -29,8 +29,8 @@ jobs:
             PS_VERSION_DOCKER: '9.0.3-3.0-classic'
             PHP_VERSION: '8.4'
             PS_THEME_FO: 'classic'
-          - PS_VERSION: '9.1.x'
-            PS_VERSION_DOCKER: '9.1.x'
+          - PS_VERSION: '9.1.4'
+            PS_VERSION_DOCKER: '9.1.4'
             PHP_VERSION: '8.4'
             PS_THEME_FO: 'classic'
           - PS_VERSION: '9.2.x'
@@ -129,7 +129,7 @@ jobs:
         include:
           - PS_VERSION: '9.0.3'
             PHP_VERSION: '8.4'
-          - PS_VERSION: '9.1.x'
+          - PS_VERSION: '9.1.4'
             PHP_VERSION: '8.4'
           - PS_VERSION: '9.2.x'
             PHP_VERSION: '8.4'