codespell: Do not check conole_main

The `console_main` is a file created by labgrid and contains the output
of the DUTs serial.
There is no need to spellcheck this file.

.codespellrc

@@ -1,2 +1,2 @@
 [codespell]
-skip = ./.git,./env,./venv,./envs
+skip = ./.git,./env,./venv,./envs,console_main