fix(docs-infra): Ensure experimental tag shows up on docs (#51712)

The experimental tag is part of the stability tags along with "deprecated". This commit updates some code to pick up experimental as well.

PR Close #51712

aio/src/styles/2-modules/label/_label-theme.scss

@@ -14,7 +14,8 @@
       &.deprecated,
       &.security,
       &.impure-pipe,
-      &.dev-preview {
+      &.dev-preview,
+      &.experimental {
         background-color: constants.$brightred;
       }
 
@@ -30,7 +31,8 @@
       color: constants.$white;
       background-color: constants.$accentblue;
 
-      @each $name, $symbol in constants.$api-symbols {
+      @each $name,
+      $symbol in constants.$api-symbols {
         &.#{$name} {
           background: map.get($symbol, background);
         }