build(deps): bump actions/setup-python from 6 to 7

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>

Author: dependabot[bot]

.github/workflows/ci.yaml

@@ -18,7 +18,7 @@ jobs:
       - name: Checkout source code
         uses: actions/checkout@v6
       - name: Set up Python
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@v7
         with:
           python-version: "3.14"
           cache: 'pip'
@@ -78,7 +78,7 @@ jobs:
       - name: Checkout source code
         uses: actions/checkout@v6
       - name: Set up Python ${{ matrix.python }}
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@v7
         with:
           python-version: ${{ matrix.python }}
           cache: 'pip'
@@ -119,7 +119,7 @@ jobs:
       - name: Fetch all branches
         run: git fetch --all
       - name: Set up Python
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@v7
         with:
           python-version: "3.14"
           cache: 'pip'
@@ -147,7 +147,7 @@ jobs:
         with:
           fetch-depth: 0
       - name: Set up Python
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@v7
         with:
           python-version: "3.14"
           cache: 'pip'