feat: add tips about gifski (#5) #141

Job	Run time
Build on ubuntu-latest (linux-x64)	2m 13s
Build on macos-latest (osx-x64)	3m 15s
Build on ubuntu-latest (linux-arm64)	2m 0s
Build on macos-latest (osx-arm64)	2m 44s
Build on windows-latest (win-x64)	3m 12s
release	27s
	13m 51s

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