fix: allow missing-tag deser of tx envelope #4513

Job	Run time
doctest	1m 16s
test ubuntu-latest stable --no-default-features	1m 22s
test ubuntu-latest stable	1m 33s
check no_std	19s
clippy	43s
test ubuntu-latest stable --all-features	2m 21s
feature-checks	3m 33s
fmt	15s
test ubuntu-latest nightly --no-default-features	1m 13s
wasm-unknown	52s
wasm-wasi	1m 17s
test ubuntu-latest nightly	1m 18s
test ubuntu-latest nightly --all-features	2m 10s
cfg-check	24s
test ubuntu-latest 1.79 --no-default-features	44s
test ubuntu-latest 1.79	50s
docs	56s
test windows-latest stable --no-default-features	4m 12s
test windows-latest stable	3m 17s
test windows-latest stable --all-features	5m 55s
test windows-latest nightly --no-default-features	4m 1s
test windows-latest nightly	3m 50s
test windows-latest nightly --all-features	4m 57s
test windows-latest 1.79 --no-default-features	2m 55s
test windows-latest 1.79	2m 41s
	52m 54s

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