chore: bump go version to 1.21 (#3701)

* bum go version to 1.21

* add changelog

---------

Co-authored-by: Pantani <Pantani>

changelog.md

@@ -11,6 +11,7 @@
 
 ### Changes
 
+- [#3701](https://github.com/ignite/cli/pull/3701) Bump `go` version to 1.21
 - [#3621](https://github.com/ignite/cli/pull/3621) Change `pkg/availableport` to allow custom parameters in `Find` function and handle duplicated ports
 - [#3559](https://github.com/ignite/cli/pull/3559) Bump network plugin version to `v0.1.1`
 - [#3581](https://github.com/ignite/cli/pull/3581) Bump cometbft and cometbft-db in the template

ignite/services/plugin/template/go.mod.plush

@@ -1,6 +1,6 @@
 module <%= ModuleName %>
 
-go 1.20
+go 1.21
 
 require (
 	github.com/hashicorp/go-plugin v1.4.9

ignite/templates/app/files/go.mod.plush

@@ -1,6 +1,6 @@
 module <%= ModulePath %>
 
-go 1.20
+go 1.21
 
 require (
 	cosmossdk.io/api v0.3.1