Update Sourcegraph Docker images

[renovate]

This PR contains the following updates:

Package	Update	Change
index.docker.io/sourcegraph/cadvisor	digest	ae163e3 -> aec8ce4
index.docker.io/sourcegraph/codeinsights-db	digest	75be25e -> ef81beb
index.docker.io/sourcegraph/frontend	digest	0720678 -> ddcb4b5
index.docker.io/sourcegraph/github-proxy	digest	1e6c71f -> 3c030b6
index.docker.io/sourcegraph/gitserver	digest	2c2fb7b -> 2a1ae1e
index.docker.io/sourcegraph/indexed-searcher	digest	ede7be9 -> 9f7d05a
index.docker.io/sourcegraph/jaeger-all-in-one	digest	5ac56c8 -> ed9869b
index.docker.io/sourcegraph/precise-code-intel-worker	digest	62992cc -> 42ee0e9
index.docker.io/sourcegraph/query-runner	digest	59721e8 -> 6e3cad4
index.docker.io/sourcegraph/redis-cache	digest	35245d8 -> 2e41070
index.docker.io/sourcegraph/redis-store	digest	5e9fec6 -> 3afb95c
index.docker.io/sourcegraph/repo-updater	digest	2b2b3f3 -> 5455c50
index.docker.io/sourcegraph/search-indexer	digest	5e9a2f7 -> 59959d4
index.docker.io/sourcegraph/searcher	digest	8c5751c -> 300f03a
index.docker.io/sourcegraph/symbols	digest	bdd8ee6 -> c96c8d4
index.docker.io/sourcegraph/syntax-highlighter	digest	8854665 -> b6f9bd9
index.docker.io/sourcegraph/worker	digest	b6bfaf4 -> 3f5371a

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