chore(deps): update go to 1.26.0

Author: renovate-vince-riv[bot]

go.mod

@@ -2,7 +2,7 @@ module github.com/vince-riv/aks-node-termination-handler
 
 go 1.25.0
 
-toolchain go1.25.6
+toolchain go1.26.0
 
 require (
 	github.com/go-telegram-bot-api/telegram-bot-api v4.6.4+incompatible