Bump actions/setup-python from 6 to 7 (#466)

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 6 to 7.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](actions/setup-python@v6...v7)

---
updated-dependencies:
- dependency-name: actions/setup-python
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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/release-drafter.yml

@@ -24,7 +24,7 @@ jobs:
           fetch-depth: 0
 
       - name: Set up Python
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@v7
         with:
           python-version: '3.14'
 

.github/workflows/update_victron_mqtt.yml

@@ -17,7 +17,7 @@ jobs:
         uses: actions/checkout@v7
 
       - name: Set up Python
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@v7
         with:
           python-version: '3.14'
 

.github/workflows/validate.yaml

@@ -27,7 +27,7 @@ jobs:
     steps:
         - uses: "actions/checkout@v7"
         - name: Set up Python
-          uses: actions/setup-python@v6
+          uses: actions/setup-python@v7
           with:
             python-version: "3.14"
         - name: Install dependencies