Bump chrono from 0.4.26 to 0.4.28 #969

Job	Run time
Extract crate metadata	5s
Ensure 'cargo fmt' has been run	24s
aarch64-unknown-linux-gnu (ubuntu-20.04)	8m 32s
arm-unknown-linux-gnueabihf (ubuntu-20.04)	8m 23s
arm-unknown-linux-musleabihf (ubuntu-20.04)	5m 24s
i686-pc-windows-msvc (windows-2019)	7m 10s
i686-unknown-linux-gnu (ubuntu-20.04)	6m 41s
i686-unknown-linux-musl (ubuntu-20.04)	6m 19s
x86_64-apple-darwin (macos-12)	4m 34s
x86_64-pc-windows-gnu (windows-2019)	7m 49s
x86_64-pc-windows-msvc (windows-2019)	7m 30s
x86_64-unknown-linux-gnu (ubuntu-20.04)	8m 52s
x86_64-unknown-linux-musl (ubuntu-20.04)	6m 52s
Minimum supported rust version	2m 27s
Publish to Winget	0s
	1h 21m 2s

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