fix: plugins/catalog-node/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-AJV-15274295
- https://snyk.io/vuln/SNYK-JS-QS-15268416

Author: snyk-bot

plugins/catalog-node/package.json

@@ -36,11 +36,11 @@
     "postpack": "backstage-cli package postpack"
   },
   "dependencies": {
-    "@backstage/backend-plugin-api": "workspace:^",
+    "@backstage/backend-plugin-api": "0.6.19",
     "@backstage/catalog-client": "workspace:^",
-    "@backstage/catalog-model": "workspace:^",
-    "@backstage/errors": "workspace:^",
-    "@backstage/plugin-catalog-common": "workspace:^",
+    "@backstage/catalog-model": "0.1.1",
+    "@backstage/errors": "0.1.1",
+    "@backstage/plugin-catalog-common": "0.1.0",
     "@backstage/types": "workspace:^"
   },
   "devDependencies": {