fix lint-templates: do not use entity references

Author: tpokorra

templates/repo/issue/filter_actions.tmpl

@@ -126,7 +126,7 @@
 
 		<div class="ui dropdown jump item">
 			<span class="text">
-				&hellip;
+				…
 			</span>
 			{{svg "octicon-triangle-down" 14 "dropdown icon"}}
 

templates/repo/issue/filters.tmpl

@@ -23,7 +23,7 @@
 			{{end}}
 
 			<button class="ui compact secondary button js-btn-misc-actions">
-				&hellip;
+				…
 			</button>
 
 			<div class="misc-actions-popup tippy-target">