Add python wheel instructions to README

Add python wheel instructions to README

Author: sjain-stanford

README.md

@@ -3,3 +3,19 @@
 This repository houses release automation for torch-mlir. It is isolated from the main repository
 so that we can more strictly control people with write access.
 
+### Python Releases (x86 linux)
+Python wheels for torch-mlir are auto-generated every night and made available at [this release page](https://github.com/llvm/torch-mlir-release/releases/tag/dev-wheels).
+
+To install via `pip`, run:
+
+```shell
+pip install torch-mlir -f https://github.com/llvm/torch-mlir-release/releases/expanded_assets/dev-wheels
+```
+
+or add this to `requirements.txt`:
+```
+-f https://github.com/llvm/torch-mlir-release/releases/expanded_assets/dev-wheels
+torch-mlir
+```
+
+At the moment only linux-x86_64 builds are published, but this may be updated if the need arises (and we find appropriate owners to maintain the automation).