Bump actions/setup-python from 6 to 7 (#124)

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
...

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

Author: dependabot[bot]

.github/workflows/build_docs.yml

@@ -18,7 +18,7 @@ jobs:
     - uses: actions/checkout@v7
 
     - name: Set up Python
-      uses: actions/setup-python@v6
+      uses: actions/setup-python@v7
       with:
         python-version: 3.9
 

.github/workflows/deploy_pypi.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v7
-    - uses: actions/setup-python@v6
+    - uses: actions/setup-python@v7
 
     - name: Get versions
       # Compare the latest version on PyPI, and the current version

.github/workflows/run_tests.yml

@@ -20,7 +20,7 @@ jobs:
     steps:
     - uses: actions/checkout@v7
     - name: Set up Python
-      uses: actions/setup-python@v6
+      uses: actions/setup-python@v7
       with:
         python-version: ${{ matrix.python-version }}