chore(deps): update dependency sfdx-hardis to v5.21.2

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
sfdx-hardis (source)	5.21.1 -> 5.21.2

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Release Notes

hardisgroupcom/sfdx-hardis (sfdx-hardis)

v5.21.2

Compare Source

• hardis:org:diagnose:unused-connected-app: Fix crash when a Connected App doesn't have a CreatedBy
• hardis:doc:project2markdown: Avoid crash when a lookup field does not contain referenceTo

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[github-actions]

🦙 MegaLinter status: ⚠️ WARNING

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