doc: Refreshing shares is now implemented for DKG (#847) #1497

Job	Run time
build with default features	28s
test on beta	2m 22s
build with no_std (ristretto255)	25s
actionlint	5s
build with no_std (ed25519)	26s
Clippy	38s
Check Rust doc	34s
build with no_std (p256)	28s
build with no_std (secp256k1)	30s
Rustfmt	18s
Check if automatically generated code is up to date	24s
build with no_std (secp256k1-tr)	28s
build with no_std (rerandomized)	23s
build with MSRV (1.66.1)	2m 24s
	9m 53s

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