dev/ci: disable svg check for now
Created by: bobheadxi
This check works for me locally but looks like it's failing in CI (https://buildkite.com/sourcegraph/sourcegraph/builds/147269#f327c668-63dc-4fab-ae35-3e1f743d32e5), I'll circle back to this ASAP
Related: https://github.com/sourcegraph/sourcegraph/pull/35331
Test plan
n/a