revert change s.t. repl is entered

Author: ArcaneNibble

lib/pbio/sys/main.c

@@ -92,7 +92,7 @@ int main(int argc, char **argv) {
     while (!pbsys_status_test(PBIO_PYBRICKS_STATUS_SHUTDOWN_REQUEST)) {
 
         #if PBSYS_CONFIG_USER_PROGRAM_AUTO_START
-        pbsys_main_program_request_start(PBIO_PYBRICKS_USER_PROGRAM_ID_FIRST_SLOT, PBSYS_MAIN_PROGRAM_START_REQUEST_TYPE_BOOT);
+        pbsys_main_program_request_start(PBIO_PYBRICKS_USER_PROGRAM_ID_REPL, PBSYS_MAIN_PROGRAM_START_REQUEST_TYPE_BOOT);
         #endif
 
         // Drives all processes while we wait for user input.