Bump actions/checkout from 5 to 6 (#2101)

Bumps [actions/checkout](https://github.com/actions/checkout) from 5 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/bot-prs.yml

@@ -11,7 +11,7 @@ jobs:
   label-no-releasenotes:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Label no releasenotes
         run: |
           number=${{ github.event.pull_request.number }}

.github/workflows/cc-gha-implement.yml

@@ -21,7 +21,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
 

.github/workflows/cc-gha-iterate.yml

@@ -21,7 +21,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
 

.github/workflows/cc-gha-plan.yml

@@ -21,7 +21,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
 

.github/workflows/cc-gha-research.yml

@@ -21,7 +21,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
 

.github/workflows/install-conda-env.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout code
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
     - name: setup-micromamba
       uses: mamba-org/setup-micromamba@v2.0.7
       with:

.github/workflows/pr-auto-label.yml

@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
     - name: Sync labels with closing issues
       uses: williambdean/closing-labels@v0.0.6
       with:

.github/workflows/pypi.yml

@@ -12,7 +12,7 @@ jobs:
     name: build source distribution
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - uses: actions/setup-python@v6

.github/workflows/test.yml

@@ -43,7 +43,7 @@ jobs:
           - "tests/clv/test_distributions.py"
           - "tests/clv/ --ignore=tests/clv/models/test_pareto_nbd.py --ignore=tests/clv/models/test_beta_geo_beta_binom.py --ignore=tests/clv/models/test_beta_geo.py --ignore=tests/clv/models/test_shifted_beta_geo.py --ignore=tests/clv/models/test_basic.py --ignore=tests/clv/test_distributions.py"
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up Python
         uses: actions/setup-python@v6
         with:
@@ -78,7 +78,7 @@ jobs:
           - "tests/clv/models/test_pareto_nbd.py"
           - "--ignore tests/clv/models/test_beta_geo_beta_binom.py --ignore tests/clv/models/test_pareto_nbd.py"
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up Python
         uses: actions/setup-python@v6
         with:

.github/workflows/test_notebook.yml

@@ -43,7 +43,7 @@ jobs:
           - "--notebooks general"
           - "--exclude-dirs mmm clv bass customer_choice general"
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
 
     - name: Install uv
       uses: astral-sh/setup-uv@v7