Fix for using short and long names starting with char "0" from userPrefs.jsonc

[macvenez]

The behaviour before this commit was causing an error when using a string starting with character '0' in userPrefs.jsonc as node long or short name.

This was because all strings not quoted starting with 0 are interpreted as octal values so we couldn't use any number above 7 and also no alphabetic characters at all

<command-line>: error: invalid digit "8" in octal constant
src/mesh/NodeDB.cpp:1054:70: note: in expansion of macro 'USERPREFS_CONFIG_OWNER_LONG_NAME'
     snprintf(owner.long_name, sizeof(owner.long_name), (const char *)USERPREFS_CONFIG_OWNER_LONG_NAME);
                                                                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
<command-line>: error: invalid digit "8" in octal constant
src/mesh/NodeDB.cpp:1059:72: note: in expansion of macro 'USERPREFS_CONFIG_OWNER_SHORT_NAME'
     snprintf(owner.short_name, sizeof(owner.short_name), (const char *)USERPREFS_CONFIG_OWNER_SHORT_NAME);

when using for example:

   "USERPREFS_CONFIG_OWNER_LONG_NAME": "08715",
   "USERPREFS_CONFIG_OWNER_SHORT_NAME": "0871",

in userprefs.jsonc file.

This should fix it, probably it would be nice to check if similar problems are caused by similar declarations in userPrefs.jsonc file

[vidplace7]

@macvenez
This should work as is by wrapping in 'single quotes'.

   "USERPREFS_CONFIG_OWNER_LONG_NAME": "'08715'",
   "USERPREFS_CONFIG_OWNER_SHORT_NAME": "'0871'",