Use ASCII replacement for character 0xE2

[trivikr]

Issue #, if available:

Internal JS-4583

Description of changes:

Uses ASCII replacement for character 0xE2.

We started seeing build failures when attempting to build smithy-typescript on AL2023

> Task :smithy-typescript-codegen:javadoc FAILED
/smithy-typescript/smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/endpointsV2/RuleSetParameterFinder.java:132: error: unmappable character (0xE2) for encoding US-ASCII
     * The contextParam trait allows for binding a structure???s member value to a context

Verified that build is successful on AL2023 instance after this fix.

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