Bump actions/checkout from 4 to 6 (#20)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/update-swagger.yml

@@ -8,7 +8,7 @@ jobs:
   updateSwagger:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Get Latest Swagger UI Release
         id: swagger-ui
         run: |