fix(log): correct program name

Author: madonuko

src/log.nim

@@ -1,6 +1,6 @@
 import std/logging
 
-var logger = newConsoleLogger(fmtStr="mkfstab: $levelname: ", useStderr=true)
+var logger = newConsoleLogger(fmtStr="dive: $levelname: ", useStderr=true)
 addHandler logger
 
 export debug, error, fatal, info, log, notice, warn, logging