Docker: Update the analytics sourcecode URL in the docker local configuration (#10363)

**What this PR does / why we need it**:

The URL about Analytics sourcecode in the docker configuration file returns a 404.

**Which issue(s) this PR fixes**: *no issue opened, trivial fix*

**Special notes for your reviewer**: hello 👋 nice to meet you

cmd/loki/loki-local-config.yaml

@@ -42,7 +42,7 @@ ruler:
 # Statistics help us better understand how Loki is used, and they show us performance
 # levels for most users. This helps us prioritize features and documentation.
 # For more information on what's sent, look at
-# https://github.com/grafana/loki/blob/main/pkg/usagestats/stats.go
+# https://github.com/grafana/loki/blob/main/pkg/analytics/stats.go
 # Refer to the buildReport method to see what goes into a report.
 #
 # If you would like to disable reporting, uncomment the following lines: