chore(deps): update dependency go to v1.26.0

Author: renovate[bot]

go.mod

@@ -1,8 +1,6 @@
 module github.com/newrelic/infrastructure-bundle/builder
 
-go 1.24.0
-
-toolchain go1.24.12
+go 1.26.0
 
 require (
 	github.com/google/go-github/v82 v82.0.0