Fix date format

RHavar · RHavar · commit 1e0d7376207a · 2018-10-20T09:22:30.000+11:00
diff --git a/bip-0079.mediawiki b/bip-0079.mediawiki
@@ -7,7 +7,7 @@
   Comments-URI: https://github.com/bitcoin/bips/wiki/Comments:BIP-0079
   Status: Proposed
   Type: Informational
-  Created: 2018-10-5
+  Created: 2018-10-05
   License: CC0-1.0
 </pre>
 
