⬆️ 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/copilot-setup-steps.yml

@@ -28,7 +28,7 @@ jobs:
       uses: actions/checkout@v7
 
     - name: Set up Python
-      uses: actions/setup-python@v6
+      uses: actions/setup-python@v7
       with:
         python-version: "3.11"
         cache: pip

.github/workflows/test-formats.yml

@@ -20,7 +20,7 @@ jobs:
     steps:
     - uses: actions/checkout@v7
     - name: Set up Python 3.11
-      uses: actions/setup-python@v6
+      uses: actions/setup-python@v7
       with:
         python-version: "3.11"
     - name: Install dependencies
@@ -44,7 +44,7 @@ jobs:
     steps:
     - uses: actions/checkout@v7
     - name: Set up Python 3.11
-      uses: actions/setup-python@v6
+      uses: actions/setup-python@v7
       with:
         python-version: "3.11"
     - name: Install dependencies

.github/workflows/tests.yml

@@ -15,7 +15,7 @@ jobs:
     steps:
     - uses: actions/checkout@v7
     - name: Set up Python 3.11
-      uses: actions/setup-python@v6
+      uses: actions/setup-python@v7
       with:
         python-version: "3.11"
     - uses: pre-commit/action@v3.0.1
@@ -43,7 +43,7 @@ jobs:
     steps:
     - uses: actions/checkout@v7
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v6
+      uses: actions/setup-python@v7
       with:
         python-version: ${{ matrix.python-version }}
         allow-prereleases: true
@@ -80,7 +80,7 @@ jobs:
     - name: Checkout source
       uses: actions/checkout@v7
     - name: Set up Python 3.11
-      uses: actions/setup-python@v6
+      uses: actions/setup-python@v7
       with:
         python-version: "3.11"
     - name: Install setup
@@ -138,7 +138,7 @@ jobs:
       url: https://pypi.org/p/myst-parser
     steps:
     - uses: actions/checkout@v7
-    - uses: actions/setup-python@v6
+    - uses: actions/setup-python@v7
       with:
         python-version: "3.11"
     - run: pip install flit~=3.4
@@ -158,7 +158,7 @@ jobs:
       url: https://pypi.org/p/myst-docutils
     steps:
     - uses: actions/checkout@v7
-    - uses: actions/setup-python@v6
+    - uses: actions/setup-python@v7
       with:
         python-version: "3.11"
     - run: pip install flit~=3.4 tomlkit