Bump actions/checkout from 5 to 6 (#65)

Author: dependabot[bot]

.github/workflows/publish-addon.yml

@@ -10,7 +10,7 @@ jobs:
   check:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Set up Python 3.11
       uses: actions/setup-python@v6
       with:
@@ -30,7 +30,7 @@ jobs:
     needs: check
     if: github.ref_type == 'tag'
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Set up Python 3.11
       uses: actions/setup-python@v6
       with:
@@ -52,7 +52,7 @@ jobs:
     needs: check
     if: github.ref_type == 'tag'
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Set up Python 3.11
       uses: actions/setup-python@v6
       with: