use gcp in trace command instead of aws

[trevorackerman]

Description of your changes

Fixes #

I have: updated the example trace command to refer to gcp instead of aws

• Read and followed Upbound's contribution process.
• Run make reviewable to ensure this PR is ready for review.
• Added backport release-x.y labels to auto-backport this PR, as appropriate.

How has this code been tested

Manually previewed readme markdown.

[Upbound-CLA]

All committers have signed the CLA.

[village-labs-bot]

upbound/platform-ref-gcp #111

Change Summary

• Documentation update to correct the command example from AWS to GCP in the README.md file for the crossplane beta trace command

Potential Vulnerability

• None identified in this change as it only updates documentation

Code Smell

• None identified in this documentation change

Debug Log

• None present in this change

Unintended Consequences

• File: README.md:227
• Code: crossplane beta trace cluster.gcp.platformref.upbound.io/platform-ref-gcp
• Explanation: Users following the old AWS example might have existing scripts or automation that needs to be updated. It would be helpful to add a note about this being a breaking change for any automation relying on the previous AWS example.

Risk Score: 1

The change is a simple documentation fix replacing AWS references with GCP references. The risk is minimal as it only affects documentation and makes the example more accurate for the GCP platform reference.

[ytsarev]

Thanks a lot for the catch!