Increase memory for UCMerced hubs

[sgibson91]

• ref: https://2i2c.freshdesk.com/a/tickets/2193
• ref: https://2i2c.slack.com/archives/C028WU9PFBN/p1727414994308119?thread_ts=1727389896.430049&cid=C028WU9PFBN

[github-actions]

Merging this PR will trigger the following deployment actions.

Support and Staging deployments

Cloud Provider	Cluster Name	Upgrade Support?	Reason for Support Redeploy	Upgrade Staging?	Reason for Staging Redeploy
gcp	2i2c	No		Yes	Following helm chart values files were modified: ucmerced-common.values.yaml

Production deployments

Cloud Provider	Cluster Name	Hub Name	Reason for Redeploy
gcp	2i2c	ucmerced	Following helm chart values files were modified: ucmerced-common.values.yaml

[github-actions]

🎉🎉🎉🎉

Monitor the deployment of the hubs here 👉 https://github.com/2i2c-org/infrastructure/actions/runs/11068364110