servo: Merge #16325 - Fix formdata-blob.htm (from KiChjang:fix-formdata-wpt); r=cbrewster

The other failure is a legitimate WPT bug, will fix upstream.

Source-Repo: https://github.com/servo/servo
Source-Revision: 638e1dc40bc70c3c0d9cd2efdaef852fdb371382

servo/components/script/dom/blob.rs

@@ -164,7 +164,7 @@ impl Blob {
     }
 
     /// Get a copy of the type_string
-    pub fn get_type_string(&self) -> String {
+    pub fn type_string(&self) -> String {
         self.type_string.clone()
     }