Update rocm-doc-core to v0.30.3

Documentation theme updates

Change-Id: I043d34b2947b5b27e06ce6a4f4c32f4b1e8ad039

docs/sphinx/requirements.in

@@ -1 +1 @@
-rocm-docs-core==0.28.0
+rocm-docs-core>=0.30.3

docs/sphinx/requirements.txt

@@ -98,7 +98,7 @@ requests==2.28.2
     # via
     #   pygithub
     #   sphinx
-rocm-docs-core==0.28.0
+rocm-docs-core>=0.30.3
     # via -r requirements.in
 smmap==5.0.0
     # via gitdb