Radio: Use value instead of defaultValue

[RobinWijnant]

No description provided.

[bramvanhoutte]

You have changed the working of the Radio buttons, so that the developer has to maintain the Radio state themselves. I agree with this change, but the documentation should be updated to reflect the new way of use.

[codecov]

Codecov Report

Merging #62 into button-name-prop will decrease coverage by 0.02%.
The diff coverage is 100.00%.

@@                 Coverage Diff                  @@
##           button-name-prop      #62      +/-   ##
====================================================
- Coverage             96.44%   96.42%   -0.03%     
====================================================
  Files                    12       12              
  Lines                   169      168       -1     
  Branches                 29       29              
====================================================
- Hits                    163      162       -1     
  Misses                    6        6              

Impacted Files	Coverage Δ
src/components/Radio/RadioGroup/RadioGroup.tsx	100.00% <100.00%> (ø)

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[github-actions]

🎉 This PR is included in version 1.5.2 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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