Update doc file names and title levels #2173

Job	Run time
Build aarch64-apple-darwin	14m 32s
Lint and Unit test	4m 40s
Build debian-x86_64	9m 49s
Build x86_64-apple-darwin	2m 45s
Build x86_64-pc-windows-msvc	5m 0s
Build and test docker images	5m 42s
Build x86_64-unknown-linux-gnu	1m 47s
Test on macOS-latest	5m 35s
Test postgis:11-3.0-alpine sslmode=disable	4m 48s
Test on windows-latest	3m 51s
Test postgis:14-3.3-alpine sslmode=disable	6m 58s
Test on ubuntu-latest	1m 44s
Test postgis:15-3.3 sslmode=require	7m 23s
Package	1m 13s
CI Finished	1s
	1h 15m 48s

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