[Prod] Update dependency tinymce to v6.8.2

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
tinymce (source)	6.8.1 -> 6.8.2

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Release Notes

tinymce/tinymce (tinymce)

v6.8.2

Compare Source

Fixed

• Bespoke select toolbar buttons including fontfamily, fontsize, blocks, and styles incorrectly used plural words in their accessible names. #TINY-10426
• The align bespoke select toolbar button had an accessible name that was misleading and grammatically incorrect in certain cases. #TINY-10435
• Accessible names of bespoke select toolbar buttons including align, fontfamily, fontsize, blocks, and styles were incorrectly translated. #TINY-10426 #TINY-10435
• Clicking inside table cells with heavily nested content could cause the browser to hang. #TINY-10380
• Toggling a list that contains an LI element having another list as its first child would remove the remaining content within that LI element. #TINY-10414
• Clicking to the left or right of a non-editable div in Firefox would show two cursors. #TINY-10314

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