chore(deps): bump elliptic from 6.5.7 to 6.6.1 in /playground

Bumps [elliptic](https://github.com/indutny/elliptic) from 6.5.7 to 6.6.1.
- [Commits](indutny/elliptic@v6.5.7...v6.6.1)

---
updated-dependencies:
- dependency-name: elliptic
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

playground/yarn.lock

@@ -5944,8 +5944,8 @@ __metadata:
   linkType: hard
 
 "elliptic@npm:^6.5.4":
-  version: 6.5.7
-  resolution: "elliptic@npm:6.5.7"
+  version: 6.6.1
+  resolution: "elliptic@npm:6.6.1"
   dependencies:
     bn.js: "npm:^4.11.9"
     brorand: "npm:^1.1.0"
@@ -5954,7 +5954,7 @@ __metadata:
     inherits: "npm:^2.0.4"
     minimalistic-assert: "npm:^1.0.1"
     minimalistic-crypto-utils: "npm:^1.0.1"
-  checksum: 799959b6c54ea3564e8961f35abdf8c77e37617f3051614b05ab1fb6a04ddb65bd1caa75ed1bae375b15dda312a0f79fed26ebe76ecf05c5a7af244152a601b8
+  checksum: 8b24ef782eec8b472053793ea1e91ae6bee41afffdfcb78a81c0a53b191e715cbe1292aa07165958a9bbe675bd0955142560b1a007ffce7d6c765bcaf951a867
   languageName: node
   linkType: hard