docs: add TransferFees conformance note #13669

Job	Run time
ethereum	1m 0s
ethereum-upgrade	4m 15s
algorand	7m 4s
Aptos	2m 58s
node	2m 36s
relayer-ethereum	1m 5s
solana	4m 31s
Sui	2m 28s
terra	7m 1s
terra-2	9m 33s
cli	2m 27s
cosmwasm	1m 41s
docker	6s
npm-packages	3s
prettier	13s
rust-lint-and-tests (cosmwasm/Cargo.toml)	2m 19s
sdk_vaa	1m 18s
rust-lint-and-tests (terra/Cargo.toml)	1m 39s
spellcheck	16s
rust-lint-and-tests (sdk/rust/Cargo.toml)	34s
wormchain	3m 56s
tilt	14m 40s
node-lint	35s
node-tests	31s
	1h 12m 49s

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