docs: fix spelling; change `github` to `GitHub` #116

Job	Run time
memory / memory / fuzz_reader	8m 7s
fs / local_fs / fuzz_reader	9m 42s
s3 / minio_s3 / fuzz_reader	8m 43s
azblob / azurite_azblob / fuzz_reader	8m 9s
memory / memory / fuzz_writer	9m 27s
fs / local_fs / fuzz_writer	9m 37s
s3 / minio_s3 / fuzz_writer	8m 31s
azblob / azurite_azblob / fuzz_writer	8m 16s
	1h 10m 32s

Provide feedback