Downgrade immer to be same version as redux toolkit (#3287)

Author: sayomaki

package.json

@@ -61,7 +61,7 @@
     "hastscript": "^9.0.0",
     "i18next": "^25.0.0",
     "i18next-browser-languagedetector": "^8.0.0",
-    "immer": "^10.1.1",
+    "immer": "^9.0.21",
     "java-slang": "^1.0.13",
     "js-cookie": "^3.0.5",
     "js-slang": "^1.0.84",

yarn.lock

@@ -7557,7 +7557,7 @@ __metadata:
     i18next: "npm:^25.0.0"
     i18next-browser-languagedetector: "npm:^8.0.0"
     identity-obj-proxy: "npm:^3.0.0"
-    immer: "npm:^10.1.1"
+    immer: "npm:^9.0.21"
     java-slang: "npm:^1.0.13"
     js-cookie: "npm:^3.0.5"
     js-slang: "npm:^1.0.84"
@@ -8293,13 +8293,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"immer@npm:^10.1.1":
-  version: 10.1.1
-  resolution: "immer@npm:10.1.1"
-  checksum: 10c0/b749e10d137ccae91788f41bd57e9387f32ea6d6ea8fd7eb47b23fd7766681575efc7f86ceef7fe24c3bc9d61e38ff5d2f49c2663b2b0c056e280a4510923653
-  languageName: node
-  linkType: hard
-
 "immer@npm:^9.0.21":
   version: 9.0.21
   resolution: "immer@npm:9.0.21"