Update docs/hardware_keyboard_guidelines.md

Co-Authored-By: skullydazed <skullydazed@users.noreply.github.com>

docs/hardware_keyboard_guidelines.md

@@ -33,7 +33,7 @@ Clueboard uses sub-folders for both purposes, organization and keyboard revision
     * [`clueboard`](https://github.com/qmk/qmk_firmware/tree/master/keyboards/clueboard)  ← This is the organization directory, there's no `rules.mk` file.
       * [`60`](https://github.com/qmk/qmk_firmware/tree/master/keyboards/clueboard/60)  ← This is a compilable keyboard, it has a `rules.mk` file.
       * [`66`](https://github.com/qmk/qmk_firmware/tree/master/keyboards/clueboard/66) ← This is also compilable- it uses `DEFAULT_FOLDER` to specify `rev3` as the default revision.
-        * [`rev1`](https://github.com/qmk/qmk_firmware/tree/master/keyboards/clueboard/66/rev1)  <-- compilable, `make clueboard/66/rev1`
+        * [`rev1`](https://github.com/qmk/qmk_firmware/tree/master/keyboards/clueboard/66/rev1) ← compilable: `make clueboard/66/rev1`
         * [`rev2`](https://github.com/qmk/qmk_firmware/tree/master/keyboards/clueboard/66/rev2)  <-- compilable, `make clueboard/66/rev2`
         * [`rev3`](https://github.com/qmk/qmk_firmware/tree/master/keyboards/clueboard/66/rev3)  <-- compilable, `make clueboard/66/rev3` and `make clueboard/66`