build(deps-dev): bump the best group with 3 updates

Bumps the best group with 3 updates: @best/cli, @best/runner-headless and @best/runner-remote.


Updates `@best/cli` from 14.0.0 to 15.0.0

Updates `@best/runner-headless` from 14.0.0 to 15.0.0

Updates `@best/runner-remote` from 14.0.0 to 15.0.0

---
updated-dependencies:
- dependency-name: "@best/cli"
  dependency-version: 15.0.0
  dependency-type: direct:development
  update-type: version-update:semver-major
  dependency-group: best
- dependency-name: "@best/runner-headless"
  dependency-version: 15.0.0
  dependency-type: direct:development
  update-type: version-update:semver-major
  dependency-group: best
- dependency-name: "@best/runner-remote"
  dependency-version: 15.0.0
  dependency-type: direct:development
  update-type: version-update:semver-major
  dependency-group: best
...

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

Author: dependabot[bot]

packages/@lwc/perf-benchmarks/package.json

@@ -22,9 +22,9 @@
         "@lwc/synthetic-shadow": "8.20.0"
     },
     "devDependencies": {
-        "@best/cli": "^14.0.0",
-        "@best/runner-headless": "^14.0.0",
-        "@best/runner-remote": "^14.0.0",
+        "@best/cli": "^15.0.0",
+        "@best/runner-headless": "^15.0.0",
+        "@best/runner-remote": "^15.0.0",
         "folder-hash": "4.1.1",
         "markdown-table": "^3.0.4",
         "tachometer": "^0.7.1"