spidermonkey_115: 115.2.0 -> 115.9.1

Fixes: CVE-2024-29943, CVE-2024-29944

pkgs/development/interpreters/spidermonkey/115.nix

···
 import ./common.nix {
-  version = "115.2.0";
-  hash = "sha512-3ztO/ZYH6OtJMnF3YMhl6zGsepYkbLQ4UZDDMxbJWV4Hk6HzxF67lnSpuk/OmNg/cbBjvvCe8wfZLRzXjTDYEg==";
+  version = "115.9.1";
+  hash = "sha512-nMrt4vzaE6B/mKIRC7j5nHMkYB1mv/MR8wcKZpV2oVmP4dfeLQBdcl0fRNvjk0qcD9C3lQ9gaGBH1M6NnYEjEA==";
 }