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

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-HTTPPROXYMIDDLEWARE-9691387
- https://snyk.io/vuln/SNYK-JS-HTTPPROXYMIDDLEWARE-9691389

Author: snyk-bot

plugins/techdocs/package.json

@@ -42,7 +42,7 @@
     "@backstage/integration-react": "workspace:^",
     "@backstage/plugin-catalog-react": "workspace:^",
     "@backstage/plugin-search-common": "workspace:^",
-    "@backstage/plugin-search-react": "workspace:^",
+    "@backstage/plugin-search-react": "0.1.0",
     "@backstage/plugin-techdocs-react": "workspace:^",
     "@backstage/theme": "workspace:^",
     "@material-ui/core": "^4.12.2",