use variable for seconds capture parameter

main.c

@@ -6,7 +6,8 @@
 #include <stdlib.h>
 
 int main(int argc, char *argv[]) {
-  char *capture_audio_file = audio_capture(5);
+  uint num_seconds = 5;
+  char *capture_audio_file = audio_capture(num_seconds);
 
   // Reopen file for reading and transcribe
   FILE *file = fopen(capture_audio_file, "rb");