update changelog (forgot title for dependencies section) (#506)

Author: crodriguezvega

CHANGELOG.md

@@ -36,6 +36,8 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ## [v1.2.2](https://github.com/cosmos/ibc-go/releases/tag/v1.2.2) - 2021-10-15
 
+### Dependencies
+
 * [\#485](https://github.com/cosmos/ibc-go/pull/485) Bump SDK version to v0.44.2
 
 ## [v1.2.1](https://github.com/cosmos/ibc-go/releases/tag/v1.2.1) - 2021-10-04
@@ -64,6 +66,8 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ## [v1.1.2](https://github.com/cosmos/ibc-go/releases/tag/v1.1.2) - 2021-10-15
 
+### Dependencies
+
 * [\#485](https://github.com/cosmos/ibc-go/pull/485) Bump SDK version to v0.44.2
 
 ## [v1.1.1](https://github.com/cosmos/ibc-go/releases/tag/v1.1.1) - 2021-10-04