chore: prepare v1.2.3 release (#117)

Author: mbreithecker

.github/README.md

@@ -1,6 +1,6 @@
 # The KYVE Network
 
-###### v1.2.2
+###### v1.2.3
 
 The KYVE consensus layer is the backbone of the KYVE ecosystem. This layer is a
 sovereign Delegated Proof of Stake network built using the

CHANGELOG.md

@@ -12,7 +12,7 @@
 
 # CHANGELOG
 
-## [Unreleased]
+## [v1.2.3](https://github.com/KYVENetwork/chain/releases/tag/v1.2.3) - 2023-07-15
 
 ### API Breaking
 

Makefile

@@ -1,5 +1,5 @@
 COMMIT := $(shell git log -1 --format='%H')
-VERSION := v1.2.2 # $(shell echo $(shell git describe --tags) | sed 's/^v//')
+VERSION := v1.2.3 # $(shell echo $(shell git describe --tags) | sed 's/^v//')
 
 TEAM_ALLOCATION := 165000000000000
 ifeq ($(ENV),kaon)