build(deps): bump astral-sh/setup-uv from 5 to 6

Bumps [astral-sh/setup-uv](https://github.com/astral-sh/setup-uv) from 5 to 6.
- [Release notes](https://github.com/astral-sh/setup-uv/releases)
- [Commits](https://github.com/astral-sh/setup-uv/compare/v5...v6)

---
updated-dependencies:
- dependency-name: astral-sh/setup-uv
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/codespell.yml

@@ -17,6 +17,6 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: Codespell
         uses: codespell-project/actions-codespell@v2

.github/workflows/docs.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-24.04
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions/setup-python@v5
         with:
           python-version: "3.12"

.github/workflows/main.yml

@@ -36,7 +36,9 @@ jobs:
             urllib3-requirement: "urllib3>=2"
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
+      - name: Install uv
+        uses: astral-sh/setup-uv@v6
 
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v5
@@ -47,9 +49,9 @@ jobs:
 
       - name: Install project dependencies
         run: |
-          pip install --upgrade pip setuptools
+          uv pip install --system --upgrade pip setuptools
-          pip install codecov '.[tests]' '${{ matrix.urllib3-requirement }}'
+          uv pip install --system codecov '.[tests]' '${{ matrix.urllib3-requirement }}'
-          pip check
+          uv pip check
 
       - name: Allow creation of user namespaces (e.g. to the unshare command)
         run: |

.github/workflows/pre-commit-detect-outdated.yml

@@ -18,7 +18,7 @@ jobs:
     name: Detect outdated pre-commit hooks
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Set up Python 3.12
         uses: actions/setup-python@v5

.github/workflows/pre-commit.yml

@@ -13,7 +13,7 @@ jobs:
     name: Run pre-commit
     runs-on: ubuntu-24.04
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - uses: actions/setup-python@v5
       with:
         python-version: 3.12

.pre-commit-config.yaml

@@ -3,7 +3,7 @@
 
 repos:
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.11.2
+    rev: v0.12.7
     hooks:
       - id: ruff
         args: ["--output-format=full"]