Merge pull request #5895 from readthedocs/humitos/apiv3-docs

Update APIv3 documentation with latest changes

Author: ericholscher

docs/.rstcheck.cfg

@@ -1,5 +1,5 @@
 [rstcheck]
-ignore_directives=automodule,http:get,tabs,tab,prompt,http:patch,http:post
+ignore_directives=automodule,http:get,tabs,tab,prompt,http:patch,http:post,http:put,http:delete
 ignore_roles=djangosetting,setting,featureflags,buildpyversions
 # This error needs to be ignored for now
 # See: https://github.com/myint/rstcheck/issues/19