Bump actions/setup-python from 5 to 6

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 5 to 6.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](https://github.com/actions/setup-python/compare/v5...v6)

---
updated-dependencies:
- dependency-name: actions/setup-python
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/cron_anilist.yml

@@ -18,7 +18,7 @@ jobs:
         uses: actions/checkout@master
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: "3.12"
           cache: "pip" # caching pip dependencies

.github/workflows/cron_replay.yml

@@ -16,7 +16,7 @@ jobs:
         uses: actions/checkout@master
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: "3.12"
           cache: "pip" # caching pip dependencies

.github/workflows/cron_webmentions.yml

@@ -18,7 +18,7 @@ jobs:
         uses: actions/checkout@master
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: "3.12"
           cache: "pip" # caching pip dependencies

.github/workflows/cron_weekly.yml

@@ -13,7 +13,7 @@ jobs:
         uses: actions/checkout@master
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: "3.12"
           cache: "pip" # caching pip dependencies