Bump actions/checkout from 5 to 6 (#724)

Author: dependabot[bot]

.github/workflows/mypy.yml

@@ -24,7 +24,7 @@ jobs:
         shell: bash -l {0}
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: setup micromamba
         uses: mamba-org/setup-micromamba@v2

.github/workflows/release_to_pypi.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0  # Fetch all history for all branches and tags.
 

.github/workflows/test_docstrings.yaml

@@ -25,7 +25,7 @@ jobs:
         shell: bash -l {0}
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: setup micromamba
         uses: mamba-org/setup-micromamba@v2

.github/workflows/test_user_guide.yaml

@@ -22,7 +22,7 @@ jobs:
         shell: bash -l {0}
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: setup micromamba
         uses: mamba-org/setup-micromamba@v2

.github/workflows/tests.yaml

@@ -48,7 +48,7 @@ jobs:
         shell: bash -l {0}
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: setup micromamba
         uses: mamba-org/setup-micromamba@v2