docs: path adjustments to allow documentation to build again

- adding doc files to .gitignore

Change-Id: Ia6b2358bb1f236298ad1d705c1bed0636026632d

runtime/docs/sphinx/requirements.txt

@@ -2,7 +2,7 @@
 # This file is autogenerated by pip-compile with Python 3.10
 # by the following command:
 #
-#    pip-compile requirements.in
+#    pip-compile sphinx/requirements.in
 #
 accessible-pygments==0.0.5
     # via pydata-sphinx-theme