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

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

Author: snyk-io[bot]

plugins/techdocs-backend/package.json

@@ -48,17 +48,17 @@
     "clean": "backstage-cli package clean"
   },
   "dependencies": {
-    "@backstage/backend-common": "workspace:^",
+    "@backstage/backend-common": "0.24.1",
     "@backstage/backend-plugin-api": "workspace:^",
     "@backstage/catalog-client": "workspace:^",
-    "@backstage/catalog-model": "workspace:^",
+    "@backstage/catalog-model": "0.1.1",
     "@backstage/config": "workspace:^",
     "@backstage/errors": "workspace:^",
     "@backstage/integration": "workspace:^",
-    "@backstage/plugin-catalog-common": "workspace:^",
+    "@backstage/plugin-catalog-common": "0.1.0",
     "@backstage/plugin-permission-common": "workspace:^",
-    "@backstage/plugin-search-backend-module-techdocs": "workspace:^",
-    "@backstage/plugin-search-common": "workspace:^",
+    "@backstage/plugin-search-backend-module-techdocs": "0.4.0",
+    "@backstage/plugin-search-common": "0.3.1",
     "@backstage/plugin-techdocs-node": "workspace:^",
     "@types/express": "^4.17.6",
     "dockerode": "^3.3.1",