Update Sourcegraph Docker insiders images

[sourcegraph-bot]

This PR contains the following updates:

Package	Update	Change
index.docker.io/sourcegraph/cadvisor	digest	81ab4b5 -> d86210b
index.docker.io/sourcegraph/frontend	digest	d146a60 -> 32633d9
index.docker.io/sourcegraph/github-proxy	digest	c19d4f8 -> 4053a21
index.docker.io/sourcegraph/gitserver	digest	a03f2ec -> bd7ba95
index.docker.io/sourcegraph/grafana	digest	41644f8 -> bec93d1
index.docker.io/sourcegraph/jaeger-agent	digest	bb3433e -> c91d26b
index.docker.io/sourcegraph/jaeger-all-in-one	digest	bfc10d2 -> 7b9245e
index.docker.io/sourcegraph/precise-code-intel-worker	digest	e6a18ce -> 9e20de0
index.docker.io/sourcegraph/prometheus	digest	30bcacb -> a7b7661
index.docker.io/sourcegraph/query-runner	digest	1fe5f74 -> 65d6e1a
index.docker.io/sourcegraph/repo-updater	digest	0c1762d -> 89444d0
index.docker.io/sourcegraph/searcher	digest	d8590a2 -> c583571
index.docker.io/sourcegraph/symbols	digest	1a5e896 -> c89acd4

Source: https://github.com/sourcegraph/sourcegraph/pull/18265

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