Update docs/develop/python/observability.mdx

Author: fairlydurable

docs/develop/python/observability.mdx

@@ -222,7 +222,7 @@ workflow.upsert_search_attributes([
 
 ### Remove a Search Attribute from a Workflow {#remove-search-attribute}
 
-To remove a Search Attribute that was previously set, use a `value_unset call` on the search attribute key.
+To remove a Search Attribute that was previously set, use `value_unset call` on the Search Attribute key.
 
 ```python
 workflow.upsert_search_attributes([