Bump actions/setup-python from 5 to 6 (#1089)

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

Author: dependabot[bot]

.github/workflows/main.yml

@@ -23,7 +23,7 @@ jobs:
 
     steps:
       - uses: "actions/checkout@v4"
-      - uses: "actions/setup-python@v5"
+      - uses: "actions/setup-python@v6"
 
         with:
           python-version: "${{ matrix.python-version }}"
@@ -41,7 +41,7 @@ jobs:
 
       # We always use a modern Python version for combining coverage to prevent
       # parsing errors in older versions for modern code.
-      - uses: "actions/setup-python@v5"
+      - uses: "actions/setup-python@v6"
         with:
           python-version: "3.9"
 
@@ -67,7 +67,7 @@ jobs:
 
     steps:
       - uses: "actions/checkout@v4"
-      - uses: "actions/setup-python@v5"
+      - uses: "actions/setup-python@v6"
 
         with:
           python-version: "3.9"
@@ -94,7 +94,7 @@ jobs:
 
     steps:
       - uses: "actions/checkout@v4"
-      - uses: "actions/setup-python@v5"
+      - uses: "actions/setup-python@v6"
 
         with:
           python-version: "3.9"