Update README.md

[iamatsundere]

update storage.s3.bucket quote character

What this PR does / why we need it:

Checklist

[Place an '[x]' (no spaces) in all applicable fields. Please remove unrelated fields.]

• Chart Version bumped
• Variables are documented in the README.md
• Title of the PR starts with chart name (e.g. [mychartname])
• PR only contains changes for one chart

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: iamatsundere

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[sre-ci-robot]

Welcome @iamatsundere! It looks like this is your first PR to milvus-io/milvus-helm 🎉

[LoveEachDay]

@iamatsundere Nice catch. Could you make the commit with -s to pass dco check and also make sure rebase the commits into one?

[iamatsundere]

@LoveEachDay I just signed the commit and check it's the latest with branch 1.1. Please check it!