fix: scan barcode fields input length (backport #27389)

[mergify]

Due to recent changes with #27136 the scan barcode field was unable to take input of more than 1 letter

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This is an automatic backport of pull request #27389 done by Mergify.

[mergify]

Cherry-pick of df3e4ce has failed:

On branch mergify/bp/version-13-hotfix/pr-27389
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Unmerged paths:
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	both modified:   erpnext/accounts/doctype/sales_invoice/sales_invoice.json

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