fix(lighthouse-ci): update root workspaces to lighthouse-bundle

The previous commit renamed dev-packages/lighthouse-tests/ to
dev-packages/lighthouse-bundle/ but missed the corresponding entry in the
root package.json workspaces array. scripts/dependency-hash-key.js iterates
`workspaces` and require()s each package.json — the stale entry pointing
at the missing lighthouse-tests/package.json crashed the install-dependencies
composite action with MODULE_NOT_FOUND on the first push of the new workflow.

Author: HazAT

package.json

@@ -110,7 +110,7 @@
     "dev-packages/external-contributor-gh-action",
     "dev-packages/rollup-utils",
     "dev-packages/bundler-tests",
-    "dev-packages/lighthouse-tests"
+    "dev-packages/lighthouse-bundle"
   ],
   "devDependencies": {
     "@rollup/plugin-commonjs": "^25.0.7",