Avoid raw URLs in maintainer tables

Markdown linters like markdownlint fail by default on raw URLs. Wrap
maintainer table URLs in angle brackets to follow this norm and avoid
failures.

Signed-off-by: Daniel Farrell <dfarrell@redhat.com>

pkg/document/template.go

@@ -128,7 +128,7 @@ func getMaintainersTemplate() string {
 	maintainerBuilder.WriteString("| Name | Email | Url |\n")
 	maintainerBuilder.WriteString("| ---- | ------ | --- |\n")
 	maintainerBuilder.WriteString("  {{- range .Maintainers }}")
-	maintainerBuilder.WriteString("\n| {{ .Name }} | {{ .Email }} | {{ .Url }} |")
+	maintainerBuilder.WriteString("\n| {{ .Name }} | {{ .Email }} | <{{ .Url }}> |")
 	maintainerBuilder.WriteString("  {{- end }}")
 	maintainerBuilder.WriteString("{{ end }}")