fix: packages/backend-tasks/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-TARFS-10293725

Author: snyk-io[bot]

packages/backend-tasks/package.json

@@ -32,7 +32,7 @@
     "start": "backstage-cli package start"
   },
   "dependencies": {
-    "@backstage/backend-common": "workspace:^",
+    "@backstage/backend-common": "0.24.1",
     "@backstage/config": "workspace:^",
     "@backstage/errors": "workspace:^",
     "@backstage/types": "workspace:^",