Bump actions/checkout from 3 to 4 (#128)

.github/workflows/pr-builder.yaml

@@ -11,7 +11,7 @@ jobs:
 
     steps:
       - name: Get all the letters, words and paragraphs needed for the spell!
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Setup JDK
         uses: ./.github/actions/setup-jdk
       - name: Maven, now you do the magic! I enchant you the Bash way!