chore: deps(gomod): Bump Golang version to 1.26.4

Made with ❤️️ by updatecli

Author: updatecli

go.mod

@@ -1,6 +1,6 @@
 module github.com/updatecli/releasepost
 
-go 1.25.1
+go 1.26.4
 
 require (
 	github.com/Masterminds/semver/v3 v3.4.0