fixed typo mount.md

[jimmymcnutty]

Closes #(Insert issue number closed by this PR)

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[github-actions[bot]]

:recycle: PR Preview 37ed4cba33b8528d18aed9fc67530df76d2c21c7 has been successfully destroyed since this PR has been closed.

_{🤖 By surge-preview}

[github-actions[bot]]

E2E Test Results - DynamoDB Local - Local Block Adapter

[github-actions[bot]]

E2E Test Results - Quickstart

[arielshaqed]

Seems forgotten, but approved and obviously better -- so pulling now.