[skip ci] update revision number

Author: MarcoGorelli

web/pandas/pdeps/0005-no-default-index-mode.md

@@ -4,7 +4,7 @@
 - Status: Draft
 - Discussion: [#49693](https://github.com/pandas-dev/pandas/pull/49693)
 - Author: [Marco Gorelli](https://github.com/MarcoGorelli)
-- Revision: 1
+- Revision: 2
 
 ## Abstract