update README.md

Author: tsirysndr

README.md

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 # Trufflehog Plugin
 
+[![fluentci pipeline](https://shield.fluentci.io/x/trufflehog)](https://pkg.fluentci.io/trufflehog)
 [![ci](https://github.com/fluentci-io/trufflehog-plugin/actions/workflows/ci.yml/badge.svg)](https://github.com/fluentci-io/trufflehog-plugin/actions/workflows/ci.yml)
 
 This plugin sets up your CI/CD pipeline with a specific version of [trufflehog](https://github.com/trufflesecurity/trufflehog).