fix(deps): update dependency scratch-paint to v2.1.64

Author: renovate[bot]

package-lock.json

@@ -86,7 +86,7 @@
     "scratch-audio": "0.1.0-prerelease.20231221012053",
     "scratch-blocks": "0.2.0-prerelease.20231013132110",
     "scratch-l10n": "3.16.20231231031840",
-    "scratch-paint": "2.1.63",
+    "scratch-paint": "2.1.64",
     "scratch-render": "0.1.0-prerelease.20231220210403",
     "scratch-render-fonts": "1.0.0-prerelease.20231017225105",
     "scratch-storage": "2.3.1",