planck/premek layout - thumb shift, mouse middleclick (#3111)
* Update readme.md
updated links, hope those are the correct ones
* planck premek - left thumb shift
* middleclick key
* mod tap thumb-shift, space
* update layout description
@ -13,4 +13,4 @@ Make example for this keyboard (after setting up your build environment):
make planck/rev4:default
See [build environment setup](https://docs.qmk.fm/build_environment_setup.html) then the [make instructions](https://docs.qmk.fm/make_instructions.html) for more information.
See [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) then the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information.