ci(tests) @actions/checkout v4 -> v5

See also: https://github.com/actions/checkout/releases/tag/v5.0.0

Author: tony

.github/workflows/docs.yml

@@ -12,7 +12,7 @@ jobs:
       matrix:
         python-version: ['3.13']
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Filter changed file paths to outputs
         uses: dorny/paths-filter@v3.0.2

.github/workflows/tests.yml

@@ -12,7 +12,7 @@ jobs:
         python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
         docutils-version: ['0.18', '0.19']
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Install uv
         uses: astral-sh/setup-uv@v6
@@ -56,7 +56,7 @@ jobs:
         python-version: ['3.13']
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Install uv
         uses: astral-sh/setup-uv@v6