Closes #934 Incorrect display of infinite spelling on plan modal

[Khadreal]

Description

Fixes #934
Remove incorrect spelling of plan in the pricing modal box

Type of change

• Bug fix (non-breaking change which fixes an issue).

Detailed scenario

Check for #934 for detailed scenario

Technical description

Documentation

Added a string replace in JS to make sure the correct spelling of plan is display.

Mandatory Checklist

Code validation

• I validated all the Acceptance Criteria. If possible, provide screenshots or videos.
• I triggered all changed lines of code at least once without new errors/warnings/notices.
• I implemented built-in tests to cover the new/changed code.

Code style

• I wrote a self-explanatory code about what it does.
• I protected entry points against unexpected inputs.
• I did not introduce unnecessary complexity.
• Output messages (errors, notices, logs) are explicit enough for users to understand the issue and are actionnable.

Unticked items justification

This doesn't require any test as it's text related,

[jeawhanlee]

Working as expected

[hanna-meda]

Thanks @Khadreal for this PR.
Confirming it as fixed: name is now correct (see screenshot ^).