fix: deploy portal image with Fastify auth fix

[clee231]

Microsoft sign-in on portal.acmuic.org fails with Invalid JSON in request body because Fastify consumes the request stream before Qwik and Better Auth read it. The application fix merged in acm-member-portal#56.

Update the portal's Argo CD image pin from 2b97bec to 52d2dbf, the published image built from merge commit 52d2dbff9e3a6a79b7efa27889a8007dc2a902a2. The shared image pin updates the portal, migration init container, worker, and alumni digest when the application syncs.

Validation:

• Application build and image publication succeeded; build logs confirm the 52d2dbf tag was pushed to GHCR.
• helm lint passed using published chart version 0.1.0 and the updated values.
• Compared all seven rendered manifests against the current values: only the four portal image references change.
• git diff --check passed.

Verify Microsoft sign-in after the new image is deployed.