Specs: define registerElement() even more carefully: as previously defined, it didn't actually regi…

sky/specs/apis.md

Index: sky/specs/apis.md
diff --git a/sky/specs/apis.md b/sky/specs/apis.md
index 2ce493dbca9bc7c4794c9cc99613168765a3e6b7..bf5649d10018221d640598632cba0f11efa405a5 100644
--- a/sky/specs/apis.md
+++ b/sky/specs/apis.md
@@ -295,6 +295,7 @@ module 'sky:core' {
     //  3. let that new Function's prototype be the aforementioned prototype
     //  4. let that new Function have tagName and shadow properties set to
     //     the values passed in
+    //  5. register the new element
 
     ScriptElement? currentScript; // O(1) // returns the <script> element currently being executed if any, and if it's in this module; else null
   }