Update dependency @opentelemetry/plugin-express to ^0.8.0 (open-telemetry#1155)

Co-authored-by: Mayur Kale <[email protected]>

Author: renovate-bot

getting-started/traced-example/package.json

@@ -12,7 +12,7 @@
     "@opentelemetry/core": "^0.8.3",
     "@opentelemetry/exporter-zipkin": "^0.8.3",
     "@opentelemetry/node": "^0.8.3",
-    "@opentelemetry/plugin-express": "^0.7.0",
+    "@opentelemetry/plugin-express": "^0.8.0",
     "@opentelemetry/plugin-http": "^0.8.3",
     "@opentelemetry/plugin-https": "^0.8.3",
     "@opentelemetry/tracing": "^0.8.3",