bump gevent dependency to 23.9.1

bump to 2.9.1

Author: ikreymer

pywb/version.py

@@ -1,4 +1,4 @@
-__version__ = '2.9.0'
+__version__ = '2.9.1'
 
 if __name__ == '__main__':
     print(__version__)

requirements.txt

@@ -9,7 +9,7 @@ pyyaml
 werkzeug==2.2.3
 webencodings
 gevent==22.10.2; python_version<"3.8"
-gevent==23.9.0; python_version>="3.8"
+gevent==23.9.1; python_version>="3.8"
 greenlet>=2.0.2,<3.0; python_version<"3.12"
 greenlet==3.2.4; python_version>="3.12.0rc0"
 webassets==2.0