README documentation link is broken

I believe this is the actual link https://grafana.com/blog/an-opentelemetry-backend-in-a-docker-image-introducing-grafana-otel-lgtm/ I also believe the blog should have a redirect from https://grafana.com/blog/2024/03/13/an-opentelemetry-backend-in-a-docker-image-introducing-grafana/otel-lgtm/ to it