fix: add missing sr-only element styles to Lumo select (#10044)

Author: web-padawan

packages/vaadin-lumo-styles/src/components/select.css

@@ -57,4 +57,17 @@
     --_lumo-selected-item-height: var(--lumo-size-s);
     --_lumo-selected-item-padding: 0;
   }
+
+  .sr-only {
+    border: 0 !important;
+    clip: rect(1px, 1px, 1px, 1px) !important;
+    clip-path: inset(50%) !important;
+    height: 1px !important;
+    margin: -1px !important;
+    overflow: hidden !important;
+    padding: 0 !important;
+    position: absolute !important;
+    width: 1px !important;
+    white-space: nowrap !important;
+  }
 }