Prepare release 3.20

[github-actions]

This PR was opened by the Changesets release GitHub action. When you're ready to do a release, you can merge this and the packages will be published to npm automatically. If you're not ready to do a release yet, that's fine, whenever you add more changesets to 3.20, this PR will be updated.

Releases

saleor-dashboard@3.20.21

Patch Changes

• 8d08677: Removing value from area input in address form no more cause error
• c48e50b: The app no longer changes the url when it is already been updated.
• 38d9a92: Selecting sale entries no longer fails when browsing the sales list
• 315676c: The double success banner no longer appears during app installation
• 3e89b07: Assign product dialog no more crash when product has no channels
• 36fb327: Prevent a call update channel after voucher create when no voucher id returns from response
• 917c0f8: Adding tranalstions to shipping methods no more cause error
• 5013483: Assigning product to collection no more cause error
• 749a09f: Update variant file attribute value no more cause error