Update trufflesecurity/trufflehog Docker tag to v3.28.7

This MR contains the following updates:

Package	Type	Update	Change
trufflesecurity/trufflehog	ironbank-docker	patch	3.28.6 -> 3.28.7
trufflesecurity/trufflehog		patch	3.28.6 -> 3.28.7
trufflesecurity/trufflehog	stage	patch	3.28.6 -> 3.28.7

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Release Notes

trufflesecurity/trufflehog

v3.28.7

Compare Source

What's Changed

• Support filtering detectors by version by @​mcastorina in https://github.com/trufflesecurity/trufflehog/pull/1150

Full Changelog: https://github.com/trufflesecurity/trufflehog/compare/v3.28.6...v3.28.7

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