text/html: escape MIME type "application/ld+json" as JavaScript

Fixes #26053

Change-Id: Ic2052b1d0d4e0826a217a520c83d7bb0995ea72a
GitHub-Last-Rev: 5a3eea3dd22b0a194591ce2294b88cb340df1e8d
GitHub-Pull-Request: golang/go#26054
Reviewed-on: https://go-review.googlesource.com/c/120835Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>

src/html/template/js.go

@@ -391,6 +391,7 @@ func isJSType(mimeType string) bool {
 		"application/ecmascript",
 		"application/javascript",
 		"application/json",
+		"application/ld+json",
 		"application/x-ecmascript",
 		"application/x-javascript",
 		"text/ecmascript",

src/html/template/js_test.go

@@ -343,6 +343,7 @@ func TestIsJsMimeType(t *testing.T) {
 		{"application/javascript/version=1.8", false},
 		{"text/javascript", true},
 		{"application/json", true},
+		{"application/ld+json", true},
 	}
 
 	for _, test := range tests {