Update metrics package description

Signed-off-by: Juho Heikka <juho.heikka@gmail.com>

packages/metrics/package.json

@@ -2,7 +2,7 @@
     "name": "@k8slens/metrics",
     "private": false,
     "version": "6.5.0-alpha.1",
-    "description": "Code that is common to all Features and those registering them.",
+    "description": "Injection tokens for implementing metrics for Lens",
     "type": "commonjs",
     "publishConfig": {
       "access": "public",