Fix Firefox positioning of chart resource label (#9209)

alignment-baseline appears to be ignored in Firefox, but dominant-baseline
works. This also moves the anchor into CSS.

ui/app/components/das/recommendation-chart.hbs

@@ -24,8 +24,6 @@
 
     <text
       class="resource"
-      alignment-baseline="central"
-      text-anchor="end"
       x={{this.resourceLabel.x}}
       y={{this.resourceLabel.y}}
     >

ui/app/styles/charts/recommendation-chart.scss

@@ -9,6 +9,8 @@
 
   .resource {
     font-weight: $weight-semibold;
+    dominant-baseline: central;
+    text-anchor: end;
   }
 
   .icon.delta g {