docs: fix simple typo, yeild -> yield
There is a small typo in rdflib/plugins/parsers/notation3.py.
Should read `yield` rather than `yeild`.
@@ -184,7 +184,7 @@ def base():
"""The base URI for this process - the Web equiv of cwd
Relative or abolute unix-standard filenames parsed relative to
- this yeild the URI of the file.
+ this yield the URI of the file.
If we had a reliable way of getting a computer name,
we should put it in the hostname just to prevent ambiguity
