feat(ci): explicitly mark tao-macros as a tao dependency on covector

In #964 I forgot to update the tao-macros dependency on the tao Cargo.toml. Let's configure covector to handle that for us.

.changes/config.json

@@ -70,7 +70,8 @@
     },
     "tao": {
       "path": "./",
-      "manager": "rust"
+      "manager": "rust",
+      "dependencies": ["tao-macros"]
     }
   }
 }