fix(deps): update zipkin-gcp.version to v2.3.1

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Confidence
io.zipkin.gcp:brave-propagation-stackdriver (source)	2.3.0 → 2.3.1
io.zipkin.gcp:zipkin-sender-stackdriver (source)	2.3.0 → 2.3.1
io.zipkin.gcp:brave-encoder-stackdriver (source)	2.3.0 → 2.3.1
io.zipkin.gcp:zipkin-encoder-stackdriver (source)	2.3.0 → 2.3.1

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Warning

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Release Notes

openzipkin/zipkin-gcp (io.zipkin.gcp:brave-propagation-stackdriver)

v2.3.1: Zipkin GCP 2.3.1

Compare Source

What's Changed

Zipkin GCP 2.3.1 is a maintenance release, updating dependencies and switching publishing from OSSRH to Sonatype Central Portal.

Notable library updates:

• Zipkin 3.5.0 → 3.6.0
• Zipkin Reporter 3.5.0 → 3.5.3
• Brave 6.1.0 → 6.3.1
• Spring Boot 3.4.2 → 3.5.12
• Armeria 1.31.3 → 1.37.0
• gRPC 1.70.0 → 1.78.0
• Google Cloud Trace 2.58.0 → 2.64.0
• Google Cloud PubSub 1.137.0 → 1.140.1

Full Changelog: openzipkin/zipkin-gcp@2.3.0...2.3.1

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