Please update README.md regarding Windows build "CreateProcess: No such file..." errors.

[clintonefisher]

Build tool used:

• Platformio (Visual Studio Code plugin)
• Platformio CLI
• Other

used Hardware:

• TWatch 2020 or TWatch 2021
• M5Paper
• M5Core2
• WT32-SC01

Description of problem:
I was getting the error:

xtensa-esp32-elf-g++: error: CreateProcess: No such file or directory
*** [.pio\build\t-watch2020-v1\firmware.elf] Error 1

Additional information and things you've tried:
Per the README.md I tried removing apps from main.cpp, to no avail. I also tried shortening pathnames, etc, and that still didn't work. The SOLUTION for me was to ALSO delete the associated apps from the source tree in /src/apps.
I think it would help others to suggest that if removing apps from main.cpp doesn't work, to also remove the app source files from the build tree. It would also help to refer to issue #328 in the README.md so people understand the root of the problem is a Windows command-line length limitation. Thank you!!