minor #14763 [Form] Fixing function name (ThomasLandauer)

This PR was merged into the 4.4 branch.

Discussion
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[Form] Fixing function name

Commits
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0bd38f6 Fixing function name

Author: javiereguiluz

form/form_collections.rst

@@ -567,7 +567,7 @@ First, add a "delete this tag" link to each tag form:
         // ... the rest of the block from above
     });
 
-    function addTagForm() {
+    function addFormToCollection() {
         // ...
 
         // add a delete link to the new form