feat: add scrape_error_drop_interval to config example (#450)

Co-authored-by: Douglas J Hunley <doug.hunley@gmail.com>

Author: keithf4

changelogs/fragments/431.yml

@@ -0,0 +1,3 @@
+---
+minor_changes:
+ - sql_exporter - Add scrape_error_drop_interval setting to the configuration example

sql_exporter/common/sql_exporter.yml.example

@@ -12,6 +12,8 @@ global:
  max_idle_connections: 3
  # Maximum amount of time a connection may be reused to any one target. Infinite by default.
  max_connection_lifetime: 10m
+ # If scrape errors are corrected, how long until the scrape error metric is dropped from the metric output
+ scrape_error_drop_interval: 5m
 
 # The target(s) to monitor and the list of collectors to execute
 #