fix: Adjust pointer so extra character not included in source name when logging

The adding of UTF-8 support in 30e3ac3 / #1900 meant there was a second character present
in the symbol character strings, which was not expected here when trimming them off.

radio/src/logs.cpp

@@ -225,7 +225,7 @@ void writeHeader()
 
 #if defined(PCBFRSKY) || defined(PCBNV14)
   for (uint8_t i=1; i<NUM_STICKS+NUM_POTS+NUM_SLIDERS+1; i++) {
-    const char * p = STR_VSRCRAW[i] + 1;
+    const char * p = STR_VSRCRAW[i] + 2;
     size_t len = strlen(p);
     for (uint8_t j=0; j<len; ++j) {
       if (!*p) break;