Consider renaming `highPrepareQC` to simply `prepareQC`

[github-actions]

pocket/consensus/module.go

Lines 51 to 56 in d552ec6

	// IMPROVE: Consider renaming `highPrepareQC` to simply `prepareQC`
	highPrepareQC *typesCons.QuorumCertificate // Highest QC for which replica voted PRECOMMIT
	lockedQC *typesCons.QuorumCertificate // Highest QC for which replica voted COMMIT
	// Leader Election
	leaderId *typesCons.NodeId

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This issue was generated by todo-issue based on a IMPROVE comment in d552ec6.