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/ci.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v6
         with:
           python-version: "3.12"
       - name: Install dependencies
@@ -33,7 +33,7 @@ jobs:
         python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
     steps:
       - uses: actions/checkout@v6
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v6
         with:
           python-version: "${{ matrix.python-version }}"
       - name: Build wheels
@@ -63,7 +63,7 @@ jobs:
         target: [aarch64, armv7, ppc64le]
     steps:
       - uses: actions/checkout@v6
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v6
         with:
           python-version: "3.12"
       - name: Build wheels
@@ -103,7 +103,7 @@ jobs:
           - i686-unknown-linux-musl
     steps:
       - uses: actions/checkout@v6
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v6
         with:
           python-version: "3.12"
           architecture: x64
@@ -143,7 +143,7 @@ jobs:
             arch: armv7
     steps:
       - uses: actions/checkout@v6
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v6
         with:
           python-version: "3.12"
       - name: Build wheels
@@ -179,7 +179,7 @@ jobs:
             interpreter: "3.13"
     steps:
       - uses: actions/checkout@v6
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v6
         with:
           python-version: "${{ matrix.platform.interpreter }}"
           architecture: ${{ matrix.platform.py_arch }}
@@ -211,7 +211,7 @@ jobs:
           - { i: "pypy3.11 pypy3.11 3.11 3.12 3.13 3.14", py: "pypy3.11" }
     steps:
       - uses: actions/checkout@v6
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v6
         with:
           python-version: "${{ matrix.py.py }}"
       - uses: dtolnay/rust-toolchain@stable

.github/workflows/codspeed.yml

@@ -18,7 +18,7 @@ jobs:
     steps:
       - uses: actions/checkout@v6
       - name: Setup Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: "3.12"
       - name: Install dependencies