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] <[email protected]>

Author: dependabot[bot]

.github/workflows/diff.yml

@@ -33,7 +33,7 @@ jobs:
           traefik-enabled: false
           docker-enabled: true
 
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v6
         with:
           python-version: "3.12"
 

.github/workflows/playwright.yaml

@@ -61,7 +61,7 @@ jobs:
           npm install
           npm run webpack
 
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v6
         id: setup-python
         with:
           python-version: "3.12"

.github/workflows/publish.yml

@@ -40,7 +40,7 @@ jobs:
           # chartpress requires the full history
           fetch-depth: 0
 
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v6
         with:
           python-version: "3.12"
 
@@ -117,7 +117,7 @@ jobs:
         with:
           # Versioneer requires past tags
           fetch-depth: 0
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v6
         with:
           python-version: "3.12"
       - name: Install pypa/build

.github/workflows/test-docker-build.yaml

@@ -36,7 +36,7 @@ jobs:
           # correctly
           fetch-depth: 0
 
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v6
         with:
           python-version: "3.12"
 

.github/workflows/test.yml

@@ -152,7 +152,7 @@ jobs:
           npm install
           npm run webpack
 
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v6
         id: setup-python
         with:
           python-version: "3.12"
@@ -408,7 +408,7 @@ jobs:
           path: ~/.npm
           key: node-${{ steps.setup-node.outputs.node-version }}-${{ hashFiles('**/package.json') }}-${{ github.job }}
 
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v6
         id: setup-python
         with:
           # Set this to the oldest Python version supported by BinderHub