FINERACT-2429: Fix typo getCreditAcount to getCreditAccount in Tax Component

[Monica-CodingWorld]

Description

This PR fixes the typo in method name from getCreditAcount to getCreditAccount in:

• TaxComponent
• SavingsAccountTransaction

Refactoring includes:

• correcting method name
• updating all references and usages

No functional changes, only code cleanup.

Checklist

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[Aman-Mittal]

Small Change LGTM