Update Sourcegraph Docker insiders images

[sourcegraph-bot]

This PR contains the following updates:

Package	Update	Change
index.docker.io/sourcegraph/cadvisor	digest	1ea9e20 -> 62deafd
index.docker.io/sourcegraph/frontend	digest	156a9c9 -> e3882e1
index.docker.io/sourcegraph/github-proxy	digest	299381f -> 438baab
index.docker.io/sourcegraph/gitserver	digest	c6dcdc7 -> 0dba079
index.docker.io/sourcegraph/grafana	digest	582d921 -> b1326e5
index.docker.io/sourcegraph/jaeger-agent	digest	ebe0be9 -> c80073b
index.docker.io/sourcegraph/jaeger-all-in-one	digest	3b38ab2 -> 3566519
index.docker.io/sourcegraph/precise-code-intel-worker	digest	00cfade -> 2bb69c4
index.docker.io/sourcegraph/prometheus	digest	b73094b -> a7cde63
index.docker.io/sourcegraph/query-runner	digest	5b41ebc -> c01b1ef
index.docker.io/sourcegraph/repo-updater	digest	05bffdb -> f8e8565
index.docker.io/sourcegraph/searcher	digest	0ecba19 -> 0b98768
index.docker.io/sourcegraph/symbols	digest	4ae6824 -> bc890b4

Source: https://github.com/sourcegraph/sourcegraph/pull/18108

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