chore: Add highlight.run to release-please config. (#221)

## Summary

Changes to highlight.run are not triggering releases.

## How did you test this change?

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## Are there any deployment considerations?

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Author: kinyoklion

.release-please-manifest.json

@@ -6,5 +6,6 @@
 	"sdk/@launchdarkly/observability-node": "0.3.0",
 	"sdk/@launchdarkly/observability-python": "0.1.1",
 	"sdk/@launchdarkly/observability-react-native": "0.6.0",
-	"sdk/@launchdarkly/session-replay": "0.4.0"
+	"sdk/@launchdarkly/session-replay": "0.4.0",
+	"sdk/highlight-run": "9.20.0"
 }

release-please-config.json

@@ -63,6 +63,13 @@
 			"versioning": "default",
 			"include-v-in-tag": false,
 			"include-component-in-tag": true
+		},
+		"sdk/highlight-run": {
+			"package-name": "highlight.run",
+			"release-type": "node",
+			"versioning": "default",
+			"include-v-in-tag": false,
+			"include-component-in-tag": true
 		}
 	}
 }