Revert Elasticsearch remote write integration link change to point to prometheusbeat (#1412)
Revert Elasticsearch remote write integration link change to point to prometheusbeat (#1412)

repo.

Signed-off-by: Callum Styan <106b387c595dcc1a235f6eff749ea0675b25b42d@gmail.com>
prometheus/docs,prometheus/docs,prometheus/docs