MAINT: Bump ansys/actions from 4 to 6

Bumps [ansys/actions](https://github.com/ansys/actions) from 4 to 6.
- [Release notes](https://github.com/ansys/actions/releases)
- [Commits](ansys/actions@v4...v6)

---
updated-dependencies:
- dependency-name: ansys/actions
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/build_documentation.yml

@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: "Check documentation style"
-        uses: ansys/actions/doc-style@v5
+        uses: ansys/actions/doc-style@v6
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
           vale-config: "doc/.vale.ini"

.github/workflows/full_documentation.yml

@@ -108,7 +108,7 @@ jobs:
     if: github.event_name == 'push' && contains(github.ref, 'refs/tags')
     steps:
       - name: Deploy the stable documentation
-        uses: ansys/actions/doc-deploy-stable@v4
+        uses: ansys/actions/doc-deploy-stable@v6
         with:
           cname: ${{ env.DOCUMENTATION_CNAME }}
           token: ${{ secrets.GITHUB_TOKEN }}
@@ -147,7 +147,7 @@ jobs:
           echo "VERSION_MEILI=$VERSION_MEILI" >> $GITHUB_ENV
 
       - name: "Deploy the stable documentation index for PyAEDT API"
-        uses: ansys/actions/doc-deploy-index@v4
+        uses: ansys/actions/doc-deploy-index@v6
         with:
           cname: ${{ env.DOCUMENTATION_CNAME }}/version/${{ env.VERSION }}
           index-name: pyaedt-v${{ env.VERSION_MEILI }}

.github/workflows/nightly-docs.yml

@@ -81,7 +81,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Upload development documentation
-        uses: ansys/actions/doc-deploy-dev@v4
+        uses: ansys/actions/doc-deploy-dev@v6
         with:
           cname: ${{ env.DOCUMENTATION_CNAME }}
           token: ${{ secrets.GITHUB_TOKEN }}
@@ -99,7 +99,7 @@ jobs:
         run: ls -R
 
       - name: "Deploy the dev documentation index for PyAEDT API"
-        uses: ansys/actions/doc-deploy-index@v4
+        uses: ansys/actions/doc-deploy-index@v6
         with:
           cname: ${{ env.DOCUMENTATION_CNAME }}/version/dev
           index-name: pyaedt-vdev