test: fix typos in test descriptions in math/base/special/rempio2

[gunjjoshi]

Description

What is the purpose of this pull request?

This pull request:

• corrects typos in test descriptions in test.js and test.native.js in math/base/special/rempio2.
• changes them from floating-points numbers to floating-point numbers.

Related Issues

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None.

Questions

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No.

Other

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No.

Checklist

Please ensure the following tasks are completed before submitting this pull request.

• Read, understood, and followed the contributing guidelines.

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@stdlib-js/reviewers

[kgryte]

LGTM. Thanks for fixing, @gunjjoshi!