chore(deps): update dependency go to v1.26.2

Author: renovate[bot]

go.mod

@@ -2,7 +2,7 @@ module github.com/nezuchan/scheduled-tasks
 
 go 1.24.0
 
-toolchain go1.26.1
+toolchain go1.26.2
 
 require (
 	github.com/caarlos0/env/v11 v11.4.0