connect: update generator

For issue exercism#628

Use .Header in template.

Author: leenipper

exercises/connect/.meta/gen.go

@@ -32,9 +32,7 @@ type js struct {
 // template applied to above data structure generates the Go test cases
 var tmpl = `package connect
 
-// Source: {{.Ori}}
-{{if .Commit}}// Commit: {{.Commit}}
-{{end}}
+{{.Header}}
 
 var testCases = []struct {
     description string

exercises/connect/cases_test.go

@@ -1,7 +1,8 @@
 package connect
 
 // Source: exercism/x-common
-// Commit: 038124b triangle: Add JSON test data
+// Commit: 327db7f connect: Fix canonical-data.json formatting
+// x-common version: 1.0.0
 
 var testCases = []struct {
 	description string