add some spaces between sponsor logos #1922

Job	Run time
Test and deploy (1.21, ubuntu-latest, true)	10m 24s
Test and deploy (1.21, macos-latest, true)	19m 43s
Build Linux packages (amd64, ubuntu:18.04, latest, amd64)	2m 13s
Test and deploy (1.21, windows-latest, false)	18m 57s
Build Linux packages (aarch64, ubuntu18.04, latest, arm64)	17m 20s
Build Linux packages (ppc64le, ubuntu18.04, latest, ppc64le)	15m 12s
Build Linux packages (armv7, ubuntu18.04, latest, arm7)	18m 15s
Test build flags	11s
Test with PgSQL/MySQL/Cockroach	16m 27s
golangci-lint	15s
	1h 58m 57s

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