fix: upgrade @useoptic/openapi-io from 0.53.13 to 0.53.15

Snyk has created this PR to upgrade @useoptic/openapi-io from 0.53.13 to 0.53.15.

See this package in npm:
https://www.npmjs.com/package/@useoptic/openapi-io

See this project in Snyk:
https://app.snyk.io/org/platform-extensibility/project/927d3a35-84e5-41a7-8e30-46e9b6bd1c72?utm_source=github&utm_medium=referral&page=upgrade-pr

package.json

@@ -55,7 +55,7 @@
     "@stoplight/spectral-rulesets": "^1.18.1",
     "@useoptic/optic": "^0.43.0",
     "@useoptic/json-pointer-helpers": "^0.53.13",
-    "@useoptic/openapi-io": "^0.53.13",
+    "@useoptic/openapi-io": "^0.53.15",
     "@useoptic/openapi-utilities": "^0.53.11",
     "@useoptic/rulesets-base": "^0.53.13",
     "chalk": "^4.0.0",