Update Sourcegraph Docker insiders images

[sourcegraph-bot]

This PR contains the following updates:

Package	Update	Change
index.docker.io/sourcegraph/cadvisor	digest	f4854e8 -> eafc981
index.docker.io/sourcegraph/frontend	digest	61676d0 -> 886a2b4
index.docker.io/sourcegraph/github-proxy	digest	1c498f1 -> 542616f
index.docker.io/sourcegraph/gitserver	digest	11812ac -> abe3ee0
index.docker.io/sourcegraph/grafana	digest	f8bbc8f -> 00b230f
index.docker.io/sourcegraph/jaeger-agent	digest	a7963ef -> 92e36b6
index.docker.io/sourcegraph/jaeger-all-in-one	digest	943dba5 -> 5121136
index.docker.io/sourcegraph/precise-code-intel-bundle-manager	digest	d89ac89 -> 764b84e
index.docker.io/sourcegraph/precise-code-intel-worker	digest	1996c25 -> a333e68
index.docker.io/sourcegraph/prometheus	digest	d43f8b0 -> 2cbb554
index.docker.io/sourcegraph/query-runner	digest	60fe3aa -> 2e3c6fe
index.docker.io/sourcegraph/repo-updater	digest	98b4c9f -> e476a46
index.docker.io/sourcegraph/searcher	digest	9efecd0 -> e7e9275
index.docker.io/sourcegraph/symbols	digest	d979797 -> fa1d997

Source: https://github.com/sourcegraph/sourcegraph/pull/13476

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