Update Sourcegraph Docker insiders images

[sourcegraph-bot]

This PR contains the following updates:

Package	Update	Change
index.docker.io/sourcegraph/cadvisor	digest	4aa03d4 -> 092026d
index.docker.io/sourcegraph/frontend	digest	9602549 -> 44c933f
index.docker.io/sourcegraph/github-proxy	digest	713a7ef -> 656fc5a
index.docker.io/sourcegraph/gitserver	digest	575d786 -> bed2dc4
index.docker.io/sourcegraph/grafana	digest	7a8e493 -> fcf53b1
index.docker.io/sourcegraph/jaeger-agent	digest	225d832 -> 9a3ce7d
index.docker.io/sourcegraph/jaeger-all-in-one	digest	5c7adf8 -> 334b71d
index.docker.io/sourcegraph/precise-code-intel-worker	digest	f5a4f5e -> 36e7d32
index.docker.io/sourcegraph/prometheus	digest	ab8eae1 -> 53f46d7
index.docker.io/sourcegraph/query-runner	digest	dcaa846 -> 676b6a6
index.docker.io/sourcegraph/repo-updater	digest	6644683 -> 90f0472
index.docker.io/sourcegraph/searcher	digest	c8f416e -> bf6943e
index.docker.io/sourcegraph/symbols	digest	08db93f -> 149099c

Source: sourcegraph/sourcegraph#17265

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