[skip-changelog] add docs for get-version command (#118)

* [skip-changelog] add docs for get-version command

* Update mkdocs.yml

Co-authored-by: per1234 <[email protected]>

Co-authored-by: per1234 <[email protected]>

Author: umbynos

Diff for: mkdocs.yml

@@ -56,5 +56,6 @@ nav:
       - certificates flash: commands/arduino-fwuploader_certificates_flash.md
       - firmware: commands/arduino-fwuploader_firmware.md
       - firmware flash: commands/arduino-fwuploader_firmware_flash.md
+      - firmware get-version: commands/arduino-fwuploader_firmware_get-version.md
       - firmware list: commands/arduino-fwuploader_firmware_list.md
       - version: commands/arduino-fwuploader_version.md