Can't install tf2 on M1 Chip by default (#22046)

docs/source/en/installation.mdx

@@ -63,6 +63,18 @@ pip install 'transformers[torch]'
 pip install 'transformers[tf-cpu]'
 ```
 
+<Tip warning={true}>
+
+M1 / ARM Users
+    
+You will need to install the following before installing TensorFLow 2.0
+```
+brew install cmake
+brew install pkg-config
+```
+
+</Tip>
+
 🤗 Transformers and Flax:
 
 ```bash