Update dependency ajv to v7

Update ajv from 6.12.6 to 7.2.4

Change-type: patch

Author: balena-renovate[bot]

package.json

@@ -61,7 +61,7 @@
     "typescript": "^5.9.2"
   },
   "dependencies": {
-    "ajv": "^6.12.6",
+    "ajv": "^7.0.0",
     "balena-sdk": "^22.1.3",
     "docker-file-parser": "^1.0.7",
     "docker-progress": "^5.3.1",