fix: plugins/linguist/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/linguist/package.json

@@ -28,12 +28,12 @@
     "postpack": "backstage-cli package postpack"
   },
   "dependencies": {
-    "@backstage/catalog-model": "workspace:^",
+    "@backstage/catalog-model": "0.1.1",
     "@backstage/core-components": "workspace:^",
     "@backstage/core-plugin-api": "workspace:^",
     "@backstage/errors": "workspace:^",
     "@backstage/plugin-catalog-react": "workspace:^",
-    "@backstage/plugin-linguist-common": "workspace:^",
+    "@backstage/plugin-linguist-common": "0.1.0",
     "@backstage/theme": "workspace:^",
     "@material-ui/core": "^4.9.13",
     "@material-ui/icons": "^4.9.1",