Bump ajv from 6.12.6 to 6.15.0 (#471)

Bumps [ajv](https://github.com/ajv-validator/ajv) from 6.12.6 to 6.15.0.
- [Release notes](https://github.com/ajv-validator/ajv/releases)
- [Commits](ajv-validator/ajv@v6.12.6...v6.15.0)

---
updated-dependencies:
- dependency-name: ajv
  dependency-version: 6.14.0
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

yarn.lock

@@ -2456,19 +2456,19 @@ ajv-keywords@^5.1.0:
     fast-deep-equal "^3.1.3"
 
 ajv@^6.12.4:
-  version "6.12.6"
-  resolved "https://registry.yarnpkg.com/ajv/-/ajv-6.12.6.tgz#baf5a62e802b07d977034586f8c3baf5adf26df4"
-  integrity sha512-j3fVLgvTo527anyYyJOGTYJbG+vnnQYvE0m5mmkc1TK+nxAppkCLMIL0aZ4dblVCNoGShhm+kzE4ZUykBoMg4g==
+  version "6.15.0"
+  resolved "https://registry.yarnpkg.com/ajv/-/ajv-6.15.0.tgz#07e982c74626167aa7a2495c53817892d7139492"
+  integrity sha512-fgFx7Hfoq60ytK2c7DhnF8jIvzYgOMxfugjLOSMHjLIPgenqa7S7oaagATUq99mV6IYvN2tRmC0wnTYX6iPbMw==
   dependencies:
     fast-deep-equal "^3.1.1"
     fast-json-stable-stringify "^2.0.0"
     json-schema-traverse "^0.4.1"
     uri-js "^4.2.2"
 
 ajv@^8.0.0, ajv@^8.9.0:
-  version "8.18.0"
-  resolved "https://registry.yarnpkg.com/ajv/-/ajv-8.18.0.tgz#8864186b6738d003eb3a933172bb3833e10cefbc"
-  integrity sha512-PlXPeEWMXMZ7sPYOHqmDyCJzcfNrUr3fGNKtezX14ykXOEIvyK81d+qydx89KY5O71FKMPaQ2vBfBFI5NHR63A==
+  version "8.20.0"
+  resolved "https://registry.yarnpkg.com/ajv/-/ajv-8.20.0.tgz#304b3636add88ba7d936760dd50ece006dea95f9"
+  integrity sha512-Thbli+OlOj+iMPYFBVBfJ3OmCAnaSyNn4M1vz9T6Gka5Jt9ba/HIR56joy65tY6kx/FCF5VXNB819Y7/GUrBGA==
   dependencies:
     fast-deep-equal "^3.1.3"
     fast-uri "^3.0.1"