Update Sourcegraph Docker insiders images

[sourcegraph-bot]

This PR contains the following updates:

Package	Update	Change
index.docker.io/sourcegraph/cadvisor	digest	d064590 -> b58b694
index.docker.io/sourcegraph/frontend	digest	30a47cb -> 2c52c5e
index.docker.io/sourcegraph/github-proxy	digest	1c8b370 -> f6a994a
index.docker.io/sourcegraph/gitserver	digest	9e5e8b3 -> 99b4479
index.docker.io/sourcegraph/grafana	digest	b9c455e -> 96b78c8
index.docker.io/sourcegraph/jaeger-agent	digest	0da6ec9 -> f99f958
index.docker.io/sourcegraph/jaeger-all-in-one	digest	0362314 -> c1800e3
index.docker.io/sourcegraph/precise-code-intel-worker	digest	2ddfa12 -> 5eeb914
index.docker.io/sourcegraph/prometheus	digest	de61095 -> 5923ad2
index.docker.io/sourcegraph/query-runner	digest	f6c4287 -> 2efdc2d
index.docker.io/sourcegraph/repo-updater	digest	80c1ef8 -> ce3e6f7
index.docker.io/sourcegraph/searcher	digest	37fa846 -> 01043b3
index.docker.io/sourcegraph/symbols	digest	3c091a0 -> 4869800

Source: https://github.com/sourcegraph/sourcegraph/pull/18136

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