Updated PHP versions in CI configuration with 8.3 and 8.4

Author: MateuszKolankowski

.github/workflows/ci.yaml .github/workflows/backend-ci.yaml.github/workflows/ci.yaml renamed to .github/workflows/backend-ci.yaml

@@ -41,8 +41,8 @@ jobs:
             matrix:
                 php:
                     - '7.4'
-                    - '8.0'
                     - '8.3'
+                    - '8.4'
 
         steps:
             - uses: actions/checkout@v5
@@ -77,8 +77,8 @@ jobs:
             matrix:
                 php:
                     - '7.4'
-                    - '8.0'
                     - '8.3'
+                    - '8.4'
 
         steps:
             - uses: actions/checkout@v5