[ImgBot] Optimize images

[imgbot]

Beep boop. Your images are optimized!

Your image file size has been reduced by 18% 🎉

Details

File	Before	After	Percent reduction
/logos/etcd-glyph-color.png	4.28kb	2.53kb	40.94%
/logos/etcd-horizontal-color.png	4.40kb	2.63kb	40.24%
/tests/robustness/readme-images/issue14370.png	300.63kb	183.06kb	39.11%
/logos/etcd-offset-color.png	4.83kb	2.95kb	38.80%
/logos/etcd-stacked-color.png	4.62kb	2.91kb	37.07%
/Documentation/etcd-internals/diagrams/etcd_internal_parts.png	287.43kb	193.61kb	32.64%
/logos/etcd-offset-bw.png	4.76kb	3.35kb	29.52%
/Documentation/etcd-internals/diagrams/write_workflow_follower.png	615.51kb	440.41kb	28.45%
/Documentation/etcd-internals/diagrams/consistent_read_workflow.png	461.77kb	330.47kb	28.43%
/Documentation/etcd-internals/diagrams/write_workflow_leader.png	615.32kb	440.55kb	28.40%
/logos/etcd-horizontal-bw.png	3.89kb	2.86kb	26.46%
/logos/etcd-stacked-bw.png	4.46kb	3.30kb	26.11%
/tests/robustness/readme-images/prow_job.png	57.69kb	43.82kb	24.04%
/tests/robustness/readme-images/prow_job_artifacts_dir_page.png	68.41kb	52.15kb	23.77%
/tests/robustness/readme-images/prow_job_artifacts_page.png	108.04kb	82.45kb	23.69%
/pkg/adt/img/red-black-tree-04-delete-11.png	373.08kb	317.96kb	14.77%
/logos/etcd-glyph-color.svg	2.72kb	2.38kb	12.26%
/logos/etcd-horizontal-bw.svg	4.06kb	3.67kb	9.74%
/logos/etcd-stacked-bw.svg	4.12kb	3.72kb	9.69%
/logos/etcd-offset-bw.svg	4.08kb	3.69kb	9.66%
/logos/etcd-horizontal-color.svg	4.11kb	3.71kb	9.63%
/logos/etcd-stacked-color.svg	4.17kb	3.77kb	9.59%
/logos/etcd-offset-color.svg	4.13kb	3.73kb	9.56%
/tests/robustness/readme-images/artifact_archive.png	50.13kb	46.23kb	7.77%
/pkg/adt/img/red-black-tree-01-insertion.png	177.77kb	166.99kb	6.06%
/pkg/adt/img/red-black-tree-09-delete-11.png	211.46kb	200.98kb	4.96%
/pkg/adt/img/red-black-tree-03-delete-11.png	225.82kb	214.67kb	4.93%
/pkg/adt/img/red-black-tree-07-delete-11.png	224.61kb	214.23kb	4.62%
/pkg/adt/img/red-black-tree-06-delete-11.png	221.86kb	212.32kb	4.30%
/pkg/adt/img/red-black-tree-05-delete-11.png	219.46kb	210.64kb	4.02%
/pkg/adt/img/red-black-tree-08-delete-11.png	190.60kb	182.95kb	4.01%
/Documentation/contributor-guide/modules.svg	111.95kb	107.62kb	3.87%
/Documentation/contributor-guide/modules-future.svg	129.13kb	124.18kb	3.83%
/logos/etcd-xkcd-2347.png	19.75kb	19.65kb	0.54%
/pkg/adt/img/red-black-tree-02-delete-514.png	151.43kb	151.11kb	0.21%
Total :	4,880.48kb	3,981.26kb	18.42%

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