1.2.0 doesn't seem to be on BCR

Noticed this on accident at first, but would be quite helpful as I need https://github.com/hexdae/toolchains_arm_gnu/commit/2efd34df297b454a671f7656df7615628a2a7dc2 for my project. Thanks 😄 

https://registry.bazel.build/modules/toolchains_arm_gnu