Bump actions/checkout from 5 to 6 in /.github/workflows (#174)

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

Author: dependabot[bot]

.github/workflows/publish.yml

@@ -24,7 +24,7 @@ jobs:
       current_tag: ${{ steps.check_pypi.outputs.current_tag }}
       previous_tag: ${{ steps.check_pypi.outputs.previous_tag }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v6
         with:
           python-version: "3.x"
@@ -63,7 +63,7 @@ jobs:
     permissions:
       contents: read
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v6
         with:
           python-version: "3.x"
@@ -99,7 +99,7 @@ jobs:
     permissions:
       contents: write
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v6
         with:
           python-version: "3.x"
@@ -125,7 +125,7 @@ jobs:
     permissions:
       contents: read
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Extract PR Details
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}