Merge bitcoin-core#712: fix typo in coldcard simulador doc

1b3ec54 fix typo in coldcard simulador doc (Bruno Garcia)

Pull request description:

ACKs for top commit:
  achow101:
    ACK 1b3ec54

Tree-SHA512: 7469d273d26dc21b03c2b5e9dae35b25ea22eec6a6b1a40def383617c9f1b68533cf3cefb396f744e408a7fb0508c48aee7dca4234ed82ced4c10abfa4e82290

test/README.md

@@ -83,7 +83,7 @@ In order to build the Coldcard simulator, the following packages will need to be
 build-essential git python3 python3-pip libudev-dev gcc-arm-none-eabi
 ```
 
-After cloninig the Coldcard repo into this testing folder, the python packages can be installed with:
+After cloning the Coldcard repo into this testing folder, the python packages can be installed with:
 
 ```
 pip install -r ckcc_firmware/requirements.txt