security(daemon): upgrade golang to 1.23.6 (#1019)

Author: zsistla

daemon/go.mod

@@ -2,7 +2,7 @@ module github.com/newrelic/newrelic-php-agent/daemon
 
 go 1.21
 
-toolchain go1.23.1
+toolchain go1.23.6
 
 require (
 	github.com/golang/protobuf v1.5.3