fixed parameter casing inconsistency in QueryBuilder's methods onUpdate and values

[54keesh]

allowed onUpdate() to accept entity field/property names

Description of change

fixes typeorm/typeorm#10941

Pull-Request Checklist

• [x] Code is up-to-date with the master branch
• [x] npm run format to apply prettier formatting
• [x] npm run test passes with this change
• [x] This pull request links relevant issues as Fixes #0000
• [x] There are new or updated unit tests validating the change (N/A)
• [x] Documentation has been updated to reflect this change (N/A)
• [x] The new commits follow conventions explained in CONTRIBUTING.md