fix(deps): update dependency scratch-paint to v3.0.312

Author: renovate[bot]

package-lock.json

@@ -109,7 +109,7 @@
     "scratch-audio": "2.0.178",
     "scratch-blocks": "1.1.210",
     "scratch-l10n": "5.0.291",
-    "scratch-paint": "3.0.311",
+    "scratch-paint": "3.0.312",
     "scratch-render-fonts": "1.0.208",
     "scratch-storage": "4.0.178",
     "startaudiocontext": "1.2.1",