chore(deps): update sourcegraph docker insiders images

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
index.docker.io/sourcegraph/alpine-3.14 (source)	minor	6.2.1106 -> 6.4.1203
index.docker.io/sourcegraph/blobstore (source)	minor	6.2.1106 -> 6.4.1203
index.docker.io/sourcegraph/cadvisor (source)	minor	6.2.1106 -> 6.4.1203
index.docker.io/sourcegraph/dind (source)	minor	6.2.1106 -> 6.4.1203
index.docker.io/sourcegraph/embeddings	patch	5.6.185 -> 5.6.3798
index.docker.io/sourcegraph/executor (source)	minor	6.2.1106 -> 6.4.1203
index.docker.io/sourcegraph/executor-kubernetes (source)	minor	6.2.1106 -> 6.4.1203
index.docker.io/sourcegraph/frontend (source)	minor	6.2.1106 -> 6.4.1203
index.docker.io/sourcegraph/gitserver (source)	minor	6.2.1106 -> 6.4.1203
index.docker.io/sourcegraph/grafana (source)	minor	6.2.1106 -> 6.4.1203
index.docker.io/sourcegraph/indexed-searcher (source)	minor	6.2.1106 -> 6.4.1203
index.docker.io/sourcegraph/jaeger-all-in-one (source)	minor	6.2.1106 -> 6.4.1203
index.docker.io/sourcegraph/migrator (source)	minor	6.2.1106 -> 6.4.1203
index.docker.io/sourcegraph/node-exporter (source)	minor	6.2.1106 -> 6.4.1203
index.docker.io/sourcegraph/opentelemetry-collector (source)	minor	6.2.1106 -> 6.4.1203
index.docker.io/sourcegraph/postgres_exporter (source)	minor	6.2.1106 -> 6.4.1203
index.docker.io/sourcegraph/postgresql-16 (source)	minor	6.2.1106 -> 6.4.1203
index.docker.io/sourcegraph/postgresql-16-codeinsights (source)	minor	6.2.1106 -> 6.4.1203
index.docker.io/sourcegraph/precise-code-intel-worker (source)	minor	6.2.1106 -> 6.4.1203
index.docker.io/sourcegraph/prometheus (source)	minor	6.2.1106 -> 6.4.1203
index.docker.io/sourcegraph/redis-cache (source)	minor	6.2.1106 -> 6.4.1203
index.docker.io/sourcegraph/redis-store (source)	minor	6.2.1106 -> 6.4.1203
index.docker.io/sourcegraph/redis_exporter (source)	minor	6.2.1106 -> 6.4.1203
index.docker.io/sourcegraph/search-indexer (source)	minor	6.2.1106 -> 6.4.1203
index.docker.io/sourcegraph/searcher (source)	minor	6.2.1106 -> 6.4.1203
index.docker.io/sourcegraph/syntax-highlighter (source)	minor	6.2.1106 -> 6.4.1203
index.docker.io/sourcegraph/worker (source)	minor	6.2.1106 -> 6.4.1203

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