ci(docs): align checkout and setup-python with shared actions

Pin actions/checkout and actions/setup-python to v7 in the documentation
workflows so they match the versions used by the library-docs-setup
action and the reusable library documentation workflows.

Signed-off-by: Frederic Pillon <frederic.pillon@st.com>
Assisted-by: GitHub Copilot: Claude Haiku 5.5

Author: fpistm

.github/workflows/docs-check.yml

@@ -19,10 +19,10 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
         with:
           fetch-depth: 0
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v7
         with:
           python-version: "3.x"
       - run: python -m pip install -r requirements-docs.txt

.github/workflows/publish-docs.yml

@@ -25,11 +25,11 @@ jobs:
   publish:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
         with:
           fetch-depth: 0
           persist-credentials: false
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v7
         with:
           python-version: "3.x"
       - run: python -m pip install -r requirements-docs.txt