os/linux/development_tools: update cop namespace

[p-linnane]

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Noticed this when running brew style after the the bump to Rubocop 1.75.2:

extend/os/linux/development_tools.rb: Style/UselessMethodDefinition has the wrong namespace - replace it with Lint/UselessMethodDefinition
extend/os/linux/development_tools.rb: Style/UselessMethodDefinition has the wrong namespace - replace it with Lint/UselessMethodDefinition

[MikeMcQuaid]

Thanks @p-linnane!