fix: plugins/adr-backend/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-WEBPACK-15235959
- https://snyk.io/vuln/SNYK-JS-WEBPACK-15235969

Author: snyk-bot

plugins/adr-backend/package.json

@@ -35,8 +35,8 @@
     "@backstage/config": "workspace:^",
     "@backstage/errors": "workspace:^",
     "@backstage/integration": "workspace:^",
-    "@backstage/plugin-adr-common": "workspace:^",
-    "@backstage/plugin-search-common": "workspace:^",
+    "@backstage/plugin-adr-common": "0.1.0",
+    "@backstage/plugin-search-common": "0.3.1",
     "@types/express": "^4.17.6",
     "express": "^4.17.1",
     "express-promise-router": "^4.1.0",