Update dependency backoff to v2

Author: renovate[bot]

Pipfile

@@ -23,7 +23,7 @@ prometheus-client = "==0.14.0"
 psycopg2-binary = "==2.9.3"
 click = "==8.1.2"
 flask = "==2.2.5"
-backoff = "==1.11.1"
+backoff = "==2.2.1"
 boxsdk = {extras = ["jwt"],version = "==3.2.0"}
 cryptography = "==43.0.1"
 hvac = "==0.11.2"