[PATCH 3/4] ci: add workflow to check documentation build is warning free

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

With latest changes, we have a warning-free documentation build.
Add a CI check that builds the docs and translates warnings to
annotations on Github.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 .github/workflows/sphinx-docs.yml | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 .github/workflows/sphinx-docs.yml

diff --git a/.github/workflows/sphinx-docs.yml b/.github/workflows/sphinx-docs.yml
new file mode 100644
index 000000000000..6d9745d9fd5a
--- /dev/null
+++ b/.github/workflows/sphinx-docs.yml
@@ -0,0 +1,17 @@
+name: Pull Request Docs Check
+
+on: [push, pull_request]
+
+jobs:
+  docs:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    - name: Build docs
+      uses: ammaraskar/sphinx-action@master
+      with:
+        docs-folder: "Documentation/"
+        build-command: "make htmldocs"
-- 
2.47.3