Bump actions/setup-python from 5.5.0 to 5.6.0

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 5.5.0 to 5.6.0.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](actions/setup-python@8d9ed9a...a26af69)

---
updated-dependencies:
- dependency-name: actions/setup-python
  dependency-version: 5.6.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

.github/workflows/build.yml

@@ -67,7 +67,7 @@ jobs:
         path: /home/runner/.cache/ccache
         key: ccache-${{ env.BUILD_IDENTIFIER }}
 
-    - uses: actions/setup-python@8d9ed9ac5c53483de85588cdf95a591a75ab9f55 # v5.5.0
+    - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
       if: always()
       with:
         python-version: ${{ matrix.py-version }}
@@ -187,7 +187,7 @@ jobs:
     - name: Setup GNU Fortran
       uses: fortran-lang/setup-fortran@2bbdcb313d2b7e72d1d07caf87f3ef9f376d9224 # v1.6.3
 
-    - uses: actions/setup-python@8d9ed9ac5c53483de85588cdf95a591a75ab9f55 # v5.5.0
+    - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
       with:
         python-version: ${{ matrix.py-version }}
         cache: 'pip'

.github/workflows/documentation-ci.yml

@@ -38,7 +38,7 @@ jobs:
         path: /home/runner/.cache/ccache
         key: ccache-documentation-ci
 
-    - uses: actions/setup-python@8d9ed9ac5c53483de85588cdf95a591a75ab9f55 # v5.5.0
+    - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
       with:
         python-version: '3.13'
         cache: 'pip'

.github/workflows/documentation.yml

@@ -39,7 +39,7 @@ jobs:
         path: /home/runner/.cache/ccache
         key: ccache
 
-    - uses: actions/setup-python@8d9ed9ac5c53483de85588cdf95a591a75ab9f55 # v5.5.0
+    - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
       with:
         python-version: '3.13'
         cache: 'pip'