Corrected english mistakes in documentation files #657

Job	Run time
conda install latest tensorflow (ubuntu-22.04)	4m 14s
Build documentation	2m 27s
Unit tests (ubuntu-22.04, 3.10)	16m 50s
conda install (ubuntu-22.04)	2m 46s
Unit tests (macos-latest, 3.11)	9m 18s
Compatibility Testing (ubuntu-20.04, 3.6)	14m 47s
Test uproot3 (ubuntu-22.04, 3.10)	16m 25s
Unit tests (ubuntu-22.04, 3.7)	16m 16s
Style checks	2m 14s
Unit tests (ubuntu-22.04, 3.11)	16m 58s
Coverage (ubuntu-22.04, 3.10)	32s
	1h 42m 47s

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