chore(deps): update zricethezav/gitleaks docker tag to v8.18.4

This MR contains the following updates:

Package	Type	Update	Change
zricethezav/gitleaks	image-name	patch	v8.18.3 -> v8.18.4

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Release Notes

gitleaks/gitleaks (zricethezav/gitleaks)

v8.18.4

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Changelog

• 02808f4 Limit hashicorp-tf-password to .tf/.hcl files (#​1420)
• 07e1c30 rm print
• db63fc1 reduce telegram... todo url and xml for later
• 9a4538c coderabbit.ai <3
• fe94ef9 Add NewRelic insert key detection (#​1417)
• bb4424d Improved Telegram bot token rule regex and added more test cases (#​1404)
• 575e923 Add intra42 client secret (#​1408)

Shout out to @​coderabbit for their sponsorship!

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