Update google.golang.org/genproto digest to 55c9018

Passed in 33s
:pipeline:curl -sS "https://raw.githubusercontent.com/bazelbuild/continuous-integration/master/buildkite/bazelci.py?$(date +%s)" -o bazelci.py && python3.6 bazelci.py project_pipeline | tee /dev/tty | buildkite-agent pipeline upload
Waited 10s
·
Ran in 6s
Buildifier
Waited 1s
·
Ran in 7s
:ubuntu: Ubuntu 22.04 LTScurl -sS https://raw.githubusercontent.com/bazelbuild/continuous-integration/master/buildkite/bazelci.py?1740707083 -o bazelci.py && python3 bazelci.py runner --task=presubmit
Waited 5s
·
Ran in 23s
Total Job Run Time: 35s