ci(actions): Update GitHub Actions to latest versions

why: Security updates and Node.js 24 runtime support
what:
- Update astral-sh/setup-uv v5 to v7
- Update extractions/setup-just v2 to v3

refs:
- https://github.com/astral-sh/setup-uv/releases
- https://github.com/extractions/setup-just/releases

Author: tony

.github/workflows/docs.yml

@@ -17,7 +17,7 @@ jobs:
       matrix:
         python-version: ['3.14']
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Filter changed file paths to outputs
         uses: dorny/paths-filter@v3.0.2
@@ -55,7 +55,7 @@ jobs:
 
       - name: Install just
         if: env.PUBLISH == 'true'
-        uses: extractions/setup-just@v2
+        uses: extractions/setup-just@v3
 
       - name: Print python versions
         if: env.PUBLISH == 'true'

.github/workflows/tests.yml

@@ -11,7 +11,7 @@ jobs:
       matrix:
         python-version: ['3.14']
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Install uv
         uses: astral-sh/setup-uv@v7
@@ -59,7 +59,7 @@ jobs:
         python-version: ['3.14']
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Install uv
         uses: astral-sh/setup-uv@v7