community[patch]: fix typo in pgvecto_rs debug msg (#16318)

fixes typo in pip install message for the pgvecto_rs community vector
store
no issues found mentioning this
no dependents changed

libs/community/langchain_community/vectorstores/pgvecto_rs.py

@@ -38,7 +38,7 @@ class PGVecto_rs(VectorStore):
         except ImportError as e:
             raise ImportError(
                 "Unable to import pgvector_rs.sdk , please install with "
-                '`pip install "pgvector_rs[sdk]"`.'
+                '`pip install "pgvecto_rs[sdk]"`.'
             ) from e
         self._store = PGVectoRs(
             db_url=db_url,