fix: bump PostgREST version to 12.1

[sweatybridge]

What kind of change does this PR introduce?

Bug fix #2321

What is the new behavior?

• pending PostgREST release on docker hub

Additional context

Add any other context or screenshots.

[coveralls]

Pull Request Test Coverage Report for Build 9315197595

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
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• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 242 unchanged lines in 8 files lost coverage.
• Overall coverage decreased (-0.1%) to 60.178%

---

Files with Coverage Reduction	New Missed Lines	%
internal/unlink/unlink.go	2	91.67%
internal/gen/keys/keys.go	5	11.76%
internal/projects/delete/delete.go	6	52.78%
internal/utils/misc.go	12	75.89%
internal/login/login.go	15	27.06%
cmd/functions.go	33	40.3%
internal/functions/serve/serve.go	71	64.19%
internal/utils/config.go	98	55.69%

Totals
Change from base Build 9233530188:	-0.1%
Covered Lines:	6888
Relevant Lines:	11446

---

💛 - Coveralls

[mrsimpson]

FWIW: Also, after linking a local project to the one created on cloud, the local CLI fails

failed to pull docker image: Error response from daemon: manifest for public.ecr.aws/supabase/postgrest:v12.1 not found: manifest unknown: Requested image not found

This is a major bummer, as the it prevents local development. Is there any way to work around this (like intentionally downgrading the cloud project) so that local dev remains usable?