fix: upgrade @hashgraph/proto from 2.15.0-beta.3 to 2.15.0

Snyk has created this PR to upgrade @hashgraph/proto from 2.15.0-beta.3 to 2.15.0.

See this package in npm:
@hashgraph/proto

See this project in Snyk:
https://app.snyk.io/org/release-engineering-N6EoZVZn3jw4qNuVkiG5Qs/project/5af0a679-feb4-44c2-ba62-74b3508f170d?utm_source=github-enterprise&utm_medium=referral&page=upgrade-pr

Author: snyk-bot

package-lock.json

@@ -38,7 +38,7 @@
   "author": "Swirlds Labs",
   "license": "Apache2.0",
   "dependencies": {
-    "@hashgraph/proto": "^2.15.0-beta.3",
+    "@hashgraph/proto": "^2.15.0",
     "@hashgraph/sdk": "^2.50.0-beta.3",
     "@kubernetes/client-node": "^0.21.0",
     "@listr2/prompt-adapter-enquirer": "^2.0.11",