chore: Add tag-prefix for react-client-sdk release collection

[aaron-zeisler]

The react-client-sdk repo uses prefixed release tags (e.g. launchdarkly-react-client-sdk-v3.4.0) but the metadata didn't specify a tag-prefix, so sdk-meta couldn't collect releases after 3.3.2.

Here's the related pull request in the sdk-meta repository: launchdarkly/sdk-meta#366

Requirements

• I have added test coverage for new or changed functionality
• I have followed the repository's pull request submission guidelines
• I have validated my changes against all supported platform versions

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Note

Low Risk
Low risk metadata-only change that affects release discovery/collection for react-client-sdk but not runtime SDK behavior.

Overview
Updates .sdk_metadata.json to include a releases.tag-prefix for react-client-sdk (e.g. launchdarkly-react-client-sdk-), enabling release collection tooling to match the repo’s prefixed tag naming scheme.

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