[Typo] Fix links in installation instructions in README.md (#112)

Author: xwhzz

README.md

@@ -78,9 +78,9 @@ pip install .  # with -e option if you want to install in editable mode
 
 ### Method 2: Build from Source
 We currently provide three ways to install **tile-lang** from source:
- - [Install from Source (using your own TVM installation)](./docs/get_started/Installation.rst#method-1-install-from-source-using-your-own-tvm-installation)
- - [Install from Source (using the bundled TVM submodule)](./docs/get_started/Installation.rst#method-2-install-from-source-with-our-tvm-submodule)
- - [Install Using the Provided Script](./docs/get_started/Installation.rst##method-3-install-using-the-provided-script)
+ - [Install from Source (using your own TVM installation)](./docs/get_started/Installation.md#method-1-install-from-source-using-your-own-tvm-installation)
+ - [Install from Source (using the bundled TVM submodule)](./docs/get_started/Installation.md#method-2-install-from-source-with-our-tvm-submodule)
+ - [Install Using the Provided Script](./docs/get_started/Installation.md##method-3-install-using-the-provided-script)
 
 
 ## Quick Start