DOC: Update PDF standard references #4746

Job	Run time
Build & verify package	16s
Build & verify package	16s
Check code style issues	41s
Check code style issues	41s
pytest on 3.7 (crypto-lib: cryptography)	4m 10s
pytest on 3.7 (crypto-lib: cryptography)	4m 10s
pytest on windows	6m 16s
pytest on windows	6m 16s
pytest on 3.8 (crypto-lib: cryptography)	4m 50s
pytest on 3.8 (crypto-lib: cryptography)	4m 50s
pytest on 3.9 (crypto-lib: cryptography)	4m 27s
pytest on 3.9 (crypto-lib: cryptography)	4m 27s
pytest on 3.10 (crypto-lib: cryptography)	4m 26s
pytest on 3.10 (crypto-lib: cryptography)	4m 26s
pytest on 3.11 (crypto-lib: cryptography)	4m 19s
pytest on 3.11 (crypto-lib: cryptography)	4m 19s
pytest on 3.12 (crypto-lib: cryptography)	5m 34s
pytest on 3.12 (crypto-lib: cryptography)	5m 34s
pytest on 3.7 (crypto-lib: pycryptodome)	4m 20s
pytest on 3.7 (crypto-lib: pycryptodome)	4m 20s
pytest on 3.7 (crypto-lib: none)	4m 1s
pytest on 3.7 (crypto-lib: none)	4m 1s
Combine & check coverage.	16s
Combine & check coverage.	22s
	1h 27m 18s

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