chore: Add node-workspace plugin for release-please. (#223)

## Summary

Adding the node-workspace plugin. This is required to support
cross-package JS dependencies for release-please.

## How did you test this change?

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## Are there any deployment considerations?

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Author: kinyoklion

release-please-config.json

@@ -1,4 +1,10 @@
 {
+	"plugins": [
+		{
+			"type": "node-workspace",
+			"updatePeerDependencies": false
+		}
+	],
 	"packages": {
 		"sdk/@launchdarkly/observability-python": {
 			"package-name": "launchdarkly-observability-python",