chore: update dependency loopback-connector-mysql to ^7.0.15

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

acceptance/repository-mysql/package.json

@@ -37,7 +37,7 @@
     "@loopback/repository-tests": "^0.24.7",
     "@loopback/testlab": "^7.0.6",
     "@types/node": "^16.18.101",
-    "loopback-connector-mysql": "^7.0.14",
+    "loopback-connector-mysql": "^7.0.15",
     "tslib": "^2.6.3"
   }
 }