LibWeb: Make factory methods of DOM::Range fallible

Author: https://github.com/kennethmyhra
Commit: 0791195843
Pull-request: https://github.com/SerenityOS/serenity/pull/17491
Reviewed-by: https://github.com/linusg ✅

Userland/Libraries/LibWeb/DOM/Document.cpp

@@ -1256,7 +1256,7 @@ WebIDL::ExceptionOr<JS::NonnullGCPtr<ProcessingInstruction>> Document::create_pr
 
 JS::NonnullGCPtr<Range> Document::create_range()
 {
-    return Range::create(*this);
+    return Range::create(*this).release_value_but_fixme_should_propagate_errors();
 }
 
 // https://dom.spec.whatwg.org/#dom-document-createevent