docs: fix typo in query docstring (#10308)

## Description of changes

Ironically, the word string was misspelled in the docstring of a method
in the strings file. 😄

I opened codespell-project/codespell#3565 so
that this may be automatically caught in the future (if approved).

ibis/expr/types/strings.py

@@ -1437,7 +1437,7 @@ def path(self):
         return ops.ExtractPath(self).to_expr()
 
     def query(self, key: str | StringValue | None = None):
-        """Parse a URL and returns query strring or query string parameter.
+        """Parse a URL and returns query string or query string parameter.
 
         If key is passed, return the value of the query string parameter named.
         If key is absent, return the query string.