Update ktor client version for custom plugin support

[mtriston]

Update ktor-client lib from 2.1.3 to 2.2.3

Issue - #16867

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[mtriston]

Ran into a problem when tried update version to 2.3.5
https://github.com/OpenAPITools/openapi-generator/actions/runs/6572432986/job/17857278351
Can't figure out how to fix it.

Update to 2.2.3. That's enough to add custom plugins support.

[mtriston]

@jimschubert (2017/09) @dr4ke616 (2018/08) @karismann (2019/03) @Zomzog (2019/04) @andrewemery (2019/10) @4brunu (2019/11) @yutaka0m (2020/03) @stefankoppier (2022/06) @wing328
Hello! Have a look at this pr, please.

[wing328]

@mtriston thanks for the PR, which has been merged into the master.