dark: update color of timeline view icons in PR

theme-github-auto.css

@@ -1183,4 +1183,9 @@
   .ui.primary.labels .label {
     background-color: #768390 !important;
   }
+
+  // timeline view icon color
+  .repository.view.issue .comment-list .timeline-item .badge .svg {
+    fill: #fff !important;
+  }
 }

theme-github-dark.css

@@ -800,3 +800,8 @@ textarea:focus,
 .ui.primary.labels .label {
   background-color: #768390 !important;
 }
+
+// timeline view icon color
+.repository.view.issue .comment-list .timeline-item .badge .svg {
+  fill: #fff !important;
+}