fix: page crashes if Tabs has single Tab child

[chenjiahan]

Summary

Fix page crashes if Tabs has single Tab child.

Related Issue

#971

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

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[Timeless0911]

If we write like this

<Tabs tabContainerClassName="tabs-b">
  <Tab label="label2">content2</Tab>
  <Tab label="label3">content3</Tab>
</Tabs>

It contains a newline character in the middle of two <Tab>

We should filter the children array to remove the '\n' element