Update PHP version to 8.2 in Docker and project files

- Upgrade PHP version from 8.1 to 8.2 in Dockerfile, .phprc, composer.json, and docker-compose.yml.
- Modify required packages in composer.lock for compatibility with PHP 8.2.
- Update GitHub Actions to use the latest checkout action version (v4).

Author: DevquasarX9

.github/workflows/ci.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v1
+        uses: actions/checkout@v4
 
       - name: Run tests on docker compose
         run: docker compose up --abort-on-container-exit

.phprc

@@ -1 +1 @@
-php8.1
+php8.2

composer.json

@@ -5,7 +5,7 @@
   "homepage": "https://github.com/Codeception/VisualCeption",
   "license": "MIT",
   "require": {
-    "php": "^8.1",
+    "php": "^8.2",
     "ext-imagick": "*",
     "ext-mbstring": "*",
     "ext-zip": "*",