ci: lower memory ceiling
ci: lower memory ceiling

Both https://github.com/bazelbuild/rules_typescript/pull/327 and https://github.com/bazelbuild/rules_typescript/pull/378 have circleci `test` jobs being killed:
```
Server terminated abruptly (error code: 14, error message: '', log file: '/home/circleci/.cache/bazel/_bazel_circleci/cced162ff126e466524550c57f0d7df5/server/jvm.out')
```

According to the note in https://github.com/bazelbuild/rules_typescript/blob/4a087c084cab78e610f91764db52e705aefa1814/.circleci/bazel.rc#L32-L38 this means the memory limit should be reduced.

Closes #380

PiperOrigin-RevId: 228881108

bazelbuild/rules_typescript,bazelbuild/rules_typescript,bazelbuild/rules_typescript