Add doc about font #2159

Job	Run time
Build and test docker images	8m 47s
Build aarch64-apple-darwin	7m 58s
Lint and Unit test	5m 13s
Build debian-x86_64	11m 34s
Build x86_64-apple-darwin	8m 1s
Build x86_64-pc-windows-msvc	6m 33s
Build x86_64-unknown-linux-gnu	9m 38s
Test postgis:11-3.0-alpine sslmode=disable	6m 31s
Test on macOS-latest	8m 30s
Test postgis:14-3.3-alpine sslmode=disable	5m 54s
Test postgis:15-3.3 sslmode=require	8m 1s
Test on windows-latest	5m 47s
Test on ubuntu-latest	2m 56s
Package	1m 6s
CI Finished	2s
	1h 36m 31s

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