Bump actions/setup-python from 5 to 6

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 5 to 6.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](actions/setup-python@v5...v6)

---
updated-dependencies:
- dependency-name: actions/setup-python
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/build.yml

@@ -87,7 +87,7 @@ jobs:
         '
       - uses: actions/checkout@v5
       - name: 'Set up Python 3.8'
-        uses: actions/setup-python@v5  # note that this step overwrites the PKG_CONFIG_PATH variable
+        uses: actions/setup-python@v6  # note that this step overwrites the PKG_CONFIG_PATH variable
         with:
           python-version: '3.8'  # the lowest version that we support in CI
       - name: Build sdist
@@ -169,7 +169,7 @@ jobs:
             /opt/bb/bin/cdb2sql "$COMDB2_DBNAME" local "create table $table_name { $(cat $table_file) }"
           done
       - name: Set up Python ${{matrix.python-version}}
-        uses: actions/setup-python@v5  # note that this step overwrites the PKG_CONFIG_PATH variable
+        uses: actions/setup-python@v6  # note that this step overwrites the PKG_CONFIG_PATH variable
         with:
           python-version: "${{matrix.python-version}}"
       - name: Install python-comdb2 from the sdist

.github/workflows/docs.yml

@@ -22,7 +22,7 @@ jobs:
     steps:
       - uses: actions/checkout@v5
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: "3.12"
       - name: Install Python dependencies