minor: f format replace r

Author: xingzhaozhu

instrumentation/opentelemetry-instrumentation-elasticsearch/src/opentelemetry/instrumentation/elasticsearch/__init__.py

@@ -151,7 +151,7 @@ def _uninstrument(self, **kwargs):
 _regex_doc_url = re.compile(r"/_doc/([^/]+)")
 
 # search api https://www.elastic.co/guide/en/elasticsearch/reference/current/search-search.html
-_regex_search_url = re.compile(f"/([^/]+)/_search[/]?")
+_regex_search_url = re.compile(r"/([^/]+)/_search[/]?")
 
 
 def _wrap_perform_request(