fix: cargo publish warning about README #2158

Job	Run time
Lint and Unit test	5m 3s
Build and test docker images	6m 43s
Build aarch64-apple-darwin	13m 27s
Build debian-x86_64	10m 33s
Build x86_64-apple-darwin	13m 14s
Build x86_64-pc-windows-msvc	4m 55s
Build x86_64-unknown-linux-gnu	8m 59s
Test postgis:11-3.0-alpine sslmode=disable	6m 3s
Test postgis:14-3.3-alpine sslmode=disable	5m 57s
Test postgis:15-3.3 sslmode=require	5m 22s
Test on macOS-latest	5m 26s
Test on windows-latest	2m 58s
Test on ubuntu-latest	1m 37s
Package	1m 17s
CI Finished	1s
	1h 31m 35s

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