fix(extension-link): Fix the issue where a link cannot be pasted when…

[guanriyue]

Fix the issue where a link cannot be pasted when the editor content is empty and the editor is in a 'select all' state. See details at issue#5994

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• I have created a changeset for this PR if necessary.
• My changes do not break the library.
• I have added tests where applicable.
• I have followed the project guidelines.
• I have fixed any lint issues.

Related Issues

#5994

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