build(deps): 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/build.yml

@@ -155,7 +155,7 @@ jobs:
           submodules: true
           fetch-depth: 0
 
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v6
         name: Install Python
         with:
           python-version: "3.12.1"
@@ -279,7 +279,7 @@ jobs:
         if: steps.cache-c-core.outputs.cache-hit != 'true' # Only needed when building the C core
         run: sudo apt install ninja-build cmake flex bison
 
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v6
         name: Install Python
         with:
           python-version: "3.9"
@@ -326,7 +326,7 @@ jobs:
         if: steps.cache-c-core.outputs.cache-hit != 'true' # Only needed when building the C core
         run: sudo apt install ninja-build cmake flex bison
 
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v6
         name: Install Python
         with:
           python-version: "3.12"