chore(deps): update dependency rollup-plugin-license to v3

This MR contains the following updates:

Package	Type	Update	Change
rollup-plugin-license	devDependencies	major	^2.1.0 -> ^3.0.0

---

Release Notes

mjeanroy/rollup-plugin-license

v3.0.0

Compare Source

---

Configuration

Schedule: Branch creation - "every weekend" (UTC), Automerge - At any time (no schedule defined).

Automerge: Disabled by config. Please merge this manually once you are satisfied.

Rebasing: Whenever MR becomes conflicted, or you tick the rebase/retry checkbox.

Ignore: Close this MR and you won't be reminded about this update again.

---

• If you want to rebase/retry this MR, click this checkbox.

---

This MR has been generated by Renovate Bot.

toolkit-showcase/package.json

@@ -33,7 +33,7 @@
         "rollup-plugin-copy": "^3.3.0",
         "rollup-plugin-delete": "^2.0.0",
         "rollup-plugin-emit-ejs": "^3.1.0",
-        "rollup-plugin-license": "^2.1.0",
+        "rollup-plugin-license": "^3.0.0",
         "rollup-plugin-md": "^1.0.0",
         "rollup-plugin-serve": "^2.0.0",
         "rollup-plugin-terser": "^7.0.2",