chore(deps-dev): bump @rsbuild/core in the rsbuild group

Bumps the rsbuild group with 1 update: [@rsbuild/core](https://github.com/web-infra-dev/rsbuild/tree/HEAD/packages/core).


Updates `@rsbuild/core` from 1.5.6 to 1.5.9
- [Release notes](https://github.com/web-infra-dev/rsbuild/releases)
- [Commits](https://github.com/web-infra-dev/rsbuild/commits/v1.5.9/packages/core)

---
updated-dependencies:
- dependency-name: "@rsbuild/core"
  dependency-version: 1.5.9
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: rsbuild
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

examples/installing-npm/package.json

@@ -7,7 +7,7 @@
 		"clean": "rm -rf dist .turbo"
 	},
 	"devDependencies": {
-		"@rsbuild/core": "^1.5.6",
+		"@rsbuild/core": "^1.5.9",
 		"@splunk/otel-web": "workspace:*"
 	}
 }

examples/todolist/package.json

@@ -9,7 +9,7 @@
 		"clean": "rm -rf dist .turbo"
 	},
 	"devDependencies": {
-		"@rsbuild/core": "^1.5.6",
+		"@rsbuild/core": "^1.5.9",
 		"@rsbuild/plugin-react": "^1.4.0",
 		"@splunk/otel": "4.0.0",
 		"@splunk/otel-web": "workspace:*",