Fix eval compilationSink in EnsureCSPDoesNotBlockStringCompilation. (w3c#699)

Closes w3c#695

Author: fred-wang

index.bs

@@ -1493,7 +1493,7 @@ spec:SRI; urlPrefix: https://w3c.github.io/webappsec-subresource-integrity
 
   1.  Else:
 
-      1.  Let |compilationSink| be "Function" if |compilationType| is "`FUNCTION`", and "Eval" otherwise.
+      1.  Let |compilationSink| be "Function" if |compilationType| is "`FUNCTION`", and "eval" otherwise.
 
       1.  Let |isTrusted| be `true` if |bodyArg| [=implements=] {{TrustedScript}}, and `false` otherwise.