Enable linkcheck in GH actions

* enable linkcheck
* treat warn as errors

Signed-off-by: Hritik Vijay <[email protected]>

Author: Hritik14

.github/workflows/docs.yml

@@ -29,8 +29,8 @@ jobs:
 
       - name: Check Sphinx Documentation build minimally
         working-directory: ./docs
-        run: sphinx-build -E source build
+        run: sphinx-build -b linkcheck -EW source build
 
       - name: Check for documentation style errors
         working-directory: ./docs
-        run: ./scripts/doc8_style_check.sh
+        run: ./scripts/doc8_style_check.sh