Bump actions/checkout from 2.3.5 to 2.4.0 (#22)

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

.github/workflows/builder.yaml

@@ -21,7 +21,7 @@ jobs:
       changed: ${{ steps.changed_addons.outputs.changed }}
     steps:
       - name: Check out the repository
-        uses: actions/checkout@v2.3.5
+        uses: actions/checkout@v2.4.0
 
       - name: Get changed files
         id: changed_files
@@ -68,7 +68,7 @@ jobs:
 
     steps:
       - name: Check out repository
-        uses: actions/checkout@v2.3.5
+        uses: actions/checkout@v2.4.0
 
       - name: Get information
         id: info