Change slide-entry-title entry-title from h3 to h2

im looking for a solution with filter of enfold: avf_customize_heading_settings
maybe a mod can give us advice to use it on that element
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but this will work fast too with maybe with more specifity if the selectors in that line: replaceElementTag( …) are more “picky”:

function replace_tags_with_tags(){
?>
<script>
  (function($) {       
      function replaceElementTag(targetSelector, newTagString) {
        $(targetSelector).each(function(){
          var newElem = $(newTagString, {html: $(this).html()});
          $.each(this.attributes, function() {
            newElem.attr(this.name, this.value);
          });
          $(this).replaceWith(newElem);
        });
      }
      replaceElementTag('h3.entry-title', '<h2></h2>'); 
  }(jQuery)); 
</script>
<?php
}
add_action('wp_footer', 'replace_tags_with_tags');

by the way – there are css settings for h2 ( f.e. uppercase etc. ) you have to adjust those settings after change
you can have on that snippet more than one replacement . just add new lines as:
replaceElementTag('h3.entry-title', '<h2></h2>'); under each other – semicolon separated