chore: update Bazel deps to v12.1.0

This is for the first commit of the [release process](https://github.com/angular/universal/blob/4f9c6bafbfeeef17a3f66c5952135d9514c62dea/docs/process/release.md) for `v12.1.0`. `package.json` was already updated to use Angular `v12.1.0` deps by Rennovate, so nothing to do there.

Author: dgp1130

tools/defaults.bzl

@@ -30,14 +30,14 @@ def ts_library(tsconfig = None, deps = [], testonly = False, **kwargs):
         **kwargs
     )
 
-NG_VERSION = "^12.1.0-next.5"
+NG_VERSION = "^12.1.0"
 RXJS_VERSION = "^6.5.5"
 HAPI_VERSION = "^18.4.0"
 EXPRESS_VERSION = "^4.15.2"
 EXPRESS_TYPES_VERSION = "^4.17.0"
-DEVKIT_CORE_VERSION = "^12.1.0-next.5"
-DEVKIT_ARCHITECT_VERSION = "^0.1201.0-next.5"
-DEVKIT_BUILD_ANGULAR_VERSION = "^12.1.0-next.5"
+DEVKIT_CORE_VERSION = "^12.1.0"
+DEVKIT_ARCHITECT_VERSION = "^0.1201.0"
+DEVKIT_BUILD_ANGULAR_VERSION = "^12.1.0"
 TSLIB_VERSION = "^2.3.0"
 
 NGUNIVERSAL_SCOPED_PACKAGES = ["@nguniversal/%s" % p for p in [