Use actions/checkout@v6

Use this link to re-run the recipe: https://app.moderne.io/recipes/org.openrewrite.github.ChangeActionVersion?organizationId=QUxML01vZGVybmUvTW9kZXJuZSArIE9wZW5SZXdyaXRl#defaults=W3sidmFsdWUiOiJhY3Rpb25zL2NoZWNrb3V0IiwibmFtZSI6ImFjdGlvbiJ9LHsidmFsdWUiOiJ2NiIsIm5hbWUiOiJ2ZXJzaW9uIn1d

Co-authored-by: Moderne <team@moderne.io>

Author: timtebeek

.github/workflows/migrations.yml

@@ -13,7 +13,7 @@ jobs:
     steps:
       # Checkout and build parser
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - uses: actions/setup-java@v5
@@ -24,7 +24,7 @@ jobs:
 
       # Update migrations
       - name: Checkout oga-maven-plugin
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           repository: jonathanlermitage/oga-maven-plugin
           path: oga-maven-plugin