Update bip-0001.mediawiki

It seems the date is wrong for when this BIP was created. I see here (https://sourceforge.net/p/bitcoin/mailman/message/28106734/) it was created on 9/19/11. I don't see any earlier entries on the mailing list that would suggest the 8/19 date is accurate

Author: peterizzoo

bip-0001.mediawiki

@@ -6,7 +6,7 @@
   Comments-URI: https://github.com/bitcoin/bips/wiki/Comments:BIP-0001
   Status: Replaced
   Type: Process
-  Created: 2011-08-19
+  Created: 2011-09-19
   Superseded-By: 2
 </pre>