Update Sourcegraph Docker insiders images

[sourcegraph-bot]

This PR contains the following updates:

Package	Update	Change
index.docker.io/sourcegraph/cadvisor	digest	0b78415 -> bd2737e
index.docker.io/sourcegraph/frontend	digest	e733ae4 -> de51b38
index.docker.io/sourcegraph/github-proxy	digest	515ce5c -> 2247a2f
index.docker.io/sourcegraph/gitserver	digest	10e3548 -> a0d058b
index.docker.io/sourcegraph/grafana	digest	09e817d -> 419b325
index.docker.io/sourcegraph/jaeger-agent	digest	db5b463 -> 92745b9
index.docker.io/sourcegraph/jaeger-all-in-one	digest	8da181e -> 25e34e5
index.docker.io/sourcegraph/precise-code-intel-worker	digest	a7c92b8 -> eb57f05
index.docker.io/sourcegraph/prometheus	digest	875da4f -> f0ce929
index.docker.io/sourcegraph/query-runner	digest	bd4e8a8 -> 9247dce
index.docker.io/sourcegraph/repo-updater	digest	7295b4f -> cb7182f
index.docker.io/sourcegraph/searcher	digest	620db8c -> 59418e2
index.docker.io/sourcegraph/symbols	digest	aba3a1f -> b2cfc78

Source: https://github.com/sourcegraph/sourcegraph/pull/18172

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