Forgot to escape JSON string output (#4280)

Co-authored-by: NMartin Taillefer <mataille@microsoft.com>

src/Generators/Microsoft.Gen.ComplianceReports/Emitter.cs

@@ -174,6 +174,10 @@ private void OutArray(string name, Action action)
 
     private void OutNameValue(string name, string value)
     {
+        value = value
+            .Replace("\\", "\\\\")
+            .Replace("\"", "\\\"");
+
         NewItem();
         OutIndent();
         Out($"\"{name}\": \"{value}\"");