Merge pull request cli#13367 from cli/copilot/bump-go-to-1-26-3

Bump Go toolchain to 1.26.3

Author: BagToad

go.mod

@@ -2,7 +2,7 @@ module github.com/cli/cli/v2
 
 go 1.26.0
 
-toolchain go1.26.2
+toolchain go1.26.3
 
 require (
 	charm.land/bubbles/v2 v2.1.0