rename files

docs/specs/01.md

@@ -37,3 +37,24 @@ Response of `Bob`:
   ...
 }
 ```
+
+[00]: 00.md
+[01]: 02.md
+[03]: 03.md
+[04]: 04.md
+[05]: 05.md
+[06]: 06.md
+[07]: 07.md
+[08]: 08.md
+[09]: 09.md
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+[14]: 14.md
+[15]: 15.md
+[16]: 16.md
+[17]: 17.md
+[18]: 18.md
+[19]: 19.md
+[20]: 20.md