remove tail workers beta pill (#28163)

Author: nevikashah

src/content/docs/workers/observability/logs/tail-workers.mdx

@@ -6,8 +6,6 @@ description: Track and log Workers on invocation by assigning a Tail Worker to
   your projects.
 sidebar:
   order: 4
-  badge:
-    text: Beta
 ---
 
 import { WranglerConfig } from "~/components";