chore: Use newer version of actions/checkout@v4 (#15)

Also add trailing newline for FUNDING.yml

Co-authored-by: Justus Moroni <[email protected]>

.github/FUNDING.yml

@@ -1 +1 @@
-github: codappix
+github: codappix

.github/workflows/ci.yaml

@@ -5,7 +5,7 @@ jobs:
   check-composer:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Validate composer.json
         run: composer validate
@@ -20,7 +20,7 @@ jobs:
           - 8.3
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install PHP
         uses: shivammathur/setup-php@v2
@@ -35,7 +35,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: [check-composer]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Install PHP
         uses: shivammathur/setup-php@v2
@@ -58,7 +58,7 @@ jobs:
       - php-linting
       - xml-linting
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Install PHP
         uses: shivammathur/setup-php@v2
@@ -86,7 +86,7 @@ jobs:
           - php-version: '8.3'
             typo3-version: '^12.4'
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Install PHP
         uses: shivammathur/setup-php@v2
@@ -119,7 +119,7 @@ jobs:
             typo3-version: '^12.4'
             db-version: '8'
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Install PHP
         uses: shivammathur/setup-php@v2