fix(codegen): checkstyle issue in DocumentBareBonesClientGenerator

[trivikr]

Issue

This was missed in #6449 as the codegen-ci was not run, likely to some issue with one of the paths configs #6439

Description

Fix the checkstyle issue to unblock #6453
The investigation for why codegen-ci was not run will be done as a follow-up.

Testing

CI

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[trivikr]

Verified that codegen-ci was run for the commit as it contained changes in codegen/**.

[trivikr]

The new commit b79264d (#6455) did not have changes in codegen.

But the codegen-ci was still run for it. Probably because the previous commit had changes in codegen.

[trivikr]

For future reference: the only reason I can think of why codegen-ci was not run for #6449, if either because commit which contained changes in codegen folder was pushed as a part of the group.

UPDATE: when I posted this PR with new commits as part of a collection, the codegen-ci was run #6457. That makes me believe the issue in #6449 happened because of some intermediate state, like force-push which contained the changes in codegen-ci paths.