Update docs

Author: NicholasLYang

docs/site/content/repo-docs/reference/boundaries.mdx

@@ -83,6 +83,22 @@ Likewise, you can add restrictions for a tag's dependents, i.e. packages that im
 }
 ```
 
+Package names can also be used in place of a tag in allow and deny lists.
+
+```json title="turbo.json"
+{
+  "boundaries": {
+    "tags": {
+      "private": {
+        "dependents": {
+          "deny": ["@repo/my-pkg"]
+        }
+      }
+    }
+  }
+}
+```
+
 Tags allow you to ensure that the wrong package isn't getting imported somewhere in your graph. These rules are
 applied even for dependencies of dependencies, so if you import a package that in turn imports another package
 with a denied tag, you will still get a rule violation.