optimize: logger format

tools/infer/infer-pm-index256.py

@@ -199,4 +199,4 @@ for idx, name in enumerate(
     wavfile.write("ft-mi-no_opt-no_dropout-%s.wav" % name, 40000, audio)  ##
 
 
-logger.debug(ta0, ta1, ta2)  #
+logger.debug("%.2fs %.2fs %.2fs", ta0, ta1, ta2)  #

tools/rvc_for_realtime.py

@@ -343,7 +343,7 @@ class RVC:
                 )
         t5 = ttime()
         logger.info(
-            "Spent time: fea = %s, index = %s, f0 = %s, model = %s",
+            "Spent time: fea = %.2fs, index = %.2fs, f0 = %.2fs, model = %.2fs",
             t2 - t1,
             t3 - t2,
             t4 - t3,