Fixed typo in collections.md line 194

[csharpie]

Checklist

• Issue number for this PR: [Documentation] Correction for typo in collections.md on line 194 #2461 (required)
• Docs included?: yes (yes/no; required for all API/functional changes)
• Test units included?: no (yes/no; required)
• In a clean directory, yarn install, yarn test run successfully? no (yes/no; required)

Description

This pull request is to fix a documentation typo, on line 194 of ./docs/firestore/collections.md. The line is exporting an interface AccountDepositId but it is improperly named AccountDepoistId. This pull request fixes this typographical error.

Code sample

Current State:

export interface AccountDepoistId extends AccountDeposit { id: string; }

State with Pull Request Merged:

export interface AccountDepositId extends AccountDeposit { id: string; }

[NothingEverHappens]

Thank you!