Fixed install instructions for typescript example (#135)

Install instructions for typescript example were using the from directories.
The instructions from the other examples seem to be correct.

Author: J12934

examples/with-typescript/README.md

@@ -5,8 +5,8 @@
 Download the example (or clone the whole project)[https://github.com/palmerhq/backpack.git]:
 
 ```bash
-curl https://codeload.github.com/palmerhq/backpack/tar.gz/master | tar -xz --strip=2 backpack-master/examples/with-typescript-webpack-config
-cd with-custom-webpack-config
+curl https://codeload.github.com/palmerhq/backpack/tar.gz/master | tar -xz --strip=2 backpack-master/examples/with-typescript
+cd with-typescript
 ```
 
 Install it and run: