.md -> .rst in "new issue" pattern

[bscheshir]

if you have a stack dump decode it:
https://github.com/esp8266/Arduino/blob/master/doc/Troubleshooting/stack_dump.md

for better debug messages:
https://github.com/esp8266/Arduino/blob/master/doc/Troubleshooting/debugging.md

But actual instructions in rst
https://github.com/esp8266/Arduino/blob/master/doc/Troubleshooting/stack_dump.rst
https://github.com/esp8266/Arduino/blob/master/doc/Troubleshooting/debugging.rst

[devyte]

@bscheshir do you mean the links are wrong? or rather, the docs need to be converted to .md?

[bscheshir]

@devyte see PR