fix(ci): disable test workflow on releases

Given that releases are pre-empted by `prep-release` branches and PRs,
it shouldn't be necessary to run tests on the actual released tag push
to `main`.

.github/workflows/test.yaml

@@ -2,6 +2,9 @@ name: test
 
 on:
   push:
+    tags-ignore:
+      - "v[0-9]+.[0-9]+.[0-9]+"
+      - "v[0-9]+.[0-9]+.[0-9]+*"
 
 jobs:
   test: