Fix sidekiq log index mapping
Since 12/30 we get many Pubsubbeat warning alerts on pubsub-duplicate-sidekiq-inf-gprd.c.gitlab-production.internal: https://prometheus.gprd.gitlab.net/graph?g0.range_input=1w&g0.expr=rate(pubsubbeat_warnings_total%5B1m%5D)%20%3E%201&g0.tab=0 - maybe related to a deployment on that day. We should fix the index mapping.