Fix conda install on M1 mac computers

In the [latest feedstock update](https://github.com/conda-forge/nlp_primitives-feedstock/pull/12) a conditional restriction on the tensorflow version was added in an attempt to create an install environment that worked on M1 mac computers. However, the arm specific directive in `recipe.yml` does not seem to work. During local testing I end up with tensorflow 2.4.1 when running `conda install "nlp-primitives-complete=2.4.0"` instead of 2.7.0 or greater as specified in the recipe.

This with this environment the Elmo and Universal Sentence Encoder tests fail. We need to investigate why the tensorflow complete install command doesn't install the expected version of tensorflow and update the feedstock to install a version that works on M1 macs as expected.