[client-python] chore(deps): update actions/checkout action

Co-authored-by: Romuald Lemesle <romuald.lemesle@filigran.io>

Author: renovate[bot]

.github/workflows/codeql-analysis.yml

@@ -37,7 +37,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       # Initializes the CodeQL tools for scanning.
       - name: Initialize CodeQL

.github/workflows/release.yml

@@ -28,7 +28,7 @@ jobs:
         working-directory: client-python
     steps:
       - name: checkout repo content
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           repository: OpenAEV-Platform/client-python
           ref: ${{ inputs.branch_client_python }}