Bump GitHub action

Signed-off-by: Liviu-Mihail Concioiu <liviu.concioiu@gmail.com>

Author: liviuconcioiu

.github/workflows/build.yml

@@ -15,7 +15,7 @@ jobs:
         name: Build the documentation
         runs-on: ubuntu-latest
         steps:
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@v6
               with:
                   submodules: true
             - name: Install Sphinx