Add Renovate ratchet support for TruffleHog version updates

- Updated TRUFFLEHOG_VERSION to use ratchet format
- Follows same pattern as zizmor workflow
- Renovate will automatically update TruffleHog to latest versions
- Format: # ratchet:trufflesecurity/[email protected]

Author: isaiah-grafana

.github/workflows/reusable-trufflehog.yml

@@ -25,7 +25,7 @@ permissions:
   checks: write
 
 env:
-  TRUFFLEHOG_VERSION: "3.75.0"
+  TRUFFLEHOG_VERSION: 3.82.13 # ratchet:trufflesecurity/[email protected]
 
 jobs:
   trufflehog-scan: