Fix dispose causing popover title to change

see: https://github.com/twbs/bootstrap/issues/26847
in v4, destroy was replaced by dispose

js/src/popover.js

@@ -150,7 +150,7 @@ const Popover = (($) => {
         let data = $(this).data(DATA_KEY)
         const _config = typeof config === 'object' ? config : null
 
-        if (!data && /destroy|hide/.test(config)) {
+        if (!data && /dispose|hide/.test(config)) {
           return
         }