build(deps): Bump trufflesecurity/trufflehog from 3.78.1 to 3.81.6

Bumps [trufflesecurity/trufflehog](https://github.com/trufflesecurity/trufflehog) from 3.78.1 to 3.81.6.
- [Release notes](https://github.com/trufflesecurity/trufflehog/releases)
- [Changelog](https://github.com/trufflesecurity/trufflehog/blob/main/.goreleaser.yml)
- [Commits](trufflesecurity/trufflehog@433a57a...29de521)

---
updated-dependencies:
- dependency-name: trufflesecurity/trufflehog
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/trufflehog.yml

@@ -42,7 +42,7 @@ jobs:
           fetch-depth: 0
 
       - name: Check secrets with TruffleHog OSS
-        uses: trufflesecurity/trufflehog@433a57adaf8fedce312630ef593f5142227c5855 # v3.78.1
+        uses: trufflesecurity/trufflehog@29de521ed0ba207677e434386c39c1d421b2704b # v3.81.6
         with:
           path: ./
           head: HEAD