IBX-11179: Updated PHP versions in CI configuration to 8.3 and 8.4 (#46)

Author: barw4

.github/workflows/backend-ci.yaml

@@ -10,13 +10,13 @@ on:
 jobs:
     cs-fix:
         name: Run code style check
-        runs-on: "ubuntu-22.04"
+        runs-on: "ubuntu-24.04"
         strategy:
             matrix:
                 php:
                     - '8.3'
         steps:
-            -   uses: actions/checkout@v3
+            -   uses: actions/checkout@v6
 
             -   name: Setup PHP Action
                 uses: shivammathur/setup-php@v2
@@ -37,23 +37,24 @@ jobs:
         name: Deptrac
         runs-on: ubuntu-latest
         steps:
-            -   uses: actions/checkout@v3
+            -   uses: actions/checkout@v6
             -   name: Deptrac
                 uses: smoench/deptrac-action@master
 
     tests:
         name: Tests
-        runs-on: "ubuntu-22.04"
+        runs-on: "ubuntu-24.04"
         timeout-minutes: 10
 
         strategy:
             fail-fast: false
             matrix:
                 php:
                     - '8.3'
+                    - '8.4'
 
         steps:
-            -   uses: actions/checkout@v4
+            -   uses: actions/checkout@v6
 
             -   name: Setup PHP Action
                 uses: shivammathur/setup-php@v2