fix(deps): update dependency scratch-paint to v4.1.8

Author: renovate[bot]

package-lock.json

@@ -118,7 +118,7 @@
     "scratch-audio": "2.0.255",
     "scratch-blocks": "1.1.227",
     "scratch-l10n": "6.1.12",
-    "scratch-paint": "4.1.7",
+    "scratch-paint": "4.1.8",
     "scratch-render-fonts": "1.0.248",
     "scratch-storage": "4.1.27",
     "startaudiocontext": "1.2.1",