Adding release to dropdown

Author: lost-hope

index.htm

@@ -29,6 +29,10 @@ <h2>Welcome to the WLED web installer!</h2>
   <select id="ver" class="btn" onchange="resetCheckboxes();setManifest();">
 
     <optgroup label="Beta">
+      <option data-manifest="bin/beta_0_15_0-b6/manifest.json"
+        data-ethernet="bin/beta_0_15_0-b6/manifest_e.json"
+        data-test = "bin/beta_0_15_0-b6/manifest_t.json"
+        >0.15.0-b6</option>
       <option data-manifest="bin/beta_0_15_0-b5/manifest.json"
         data-ethernet="bin/beta_0_15_0-b5/manifest_e.json"
         data-test = "bin/beta_0_15_0-b5/manifest_t.json"