Update TruffleHog to latest version 3.89.2

- Updated from 3.82.13 to 3.89.2 (latest available)
- Includes several months of security fixes and improvements
- Renovate will handle future updates automatically

Author: isaiah-grafana

.github/workflows/reusable-trufflehog.yml

@@ -26,7 +26,7 @@ permissions:
 
 env:
   # renovate: datasource=github-releases depName=trufflesecurity/trufflehog
-  TRUFFLEHOG_VERSION: 3.82.13
+  TRUFFLEHOG_VERSION: 3.89.2
 
 jobs:
   trufflehog-scan: