Bump @backstage/core-components from 0.9.5 to 0.12.0

Bumps [@backstage/core-components](https://github.com/backstage/backstage/tree/HEAD/packages/core-components) from 0.9.5 to 0.12.0.
- [Release notes](https://github.com/backstage/backstage/releases)
- [Changelog](https://github.com/backstage/backstage/blob/master/packages/core-components/CHANGELOG.md)
- [Commits](https://github.com/backstage/backstage/commits/v0.12.0/packages/core-components)

---
updated-dependencies:
- dependency-name: "@backstage/core-components"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package.json

@@ -32,7 +32,7 @@
     "postpack": "backstage-cli package postpack"
   },
   "dependencies": {
-    "@backstage/core-components": "^0.9.0",
+    "@backstage/core-components": "^0.12.0",
     "@backstage/core-plugin-api": "^1.0.0",
     "@backstage/plugin-catalog-react": "^1.0.0",
     "@backstage/theme": "^0.2.14",