[doc] Update doc for preivate fields #2226

Job	Run time
build-windows-latest (Visual Studio 17 2022)	15m 6s
build-windows-2019 (Visual Studio 16 2019)	15m 29s
build (ubuntu-20.04)	27m 35s
build-windows-2019 (MinGW Makefiles)	26m 1s
build (ubuntu-22.04)	22m 49s
build (macos-13)	22m 20s
build (ubuntu-latest, ASAN, gcc-10, g++-10)	35m 27s
build (ubuntu-latest, TSAN, gcc-12, g++-12)	27m 31s
test-pyreindexer (ubuntu-20.04)	1m 14s
test-pyreindexer (ubuntu-22.04)	1m 14s
test (ubuntu-20.04, C++)	6m 16s
test (ubuntu-20.04, GO)	4m 56s
test (ubuntu-22.04, C++)	6m 9s
test (ubuntu-22.04, GO)	5m 16s
test (macos-13, C++)	6s
test (macos-13, GO)	5m 6s
test (ubuntu-latest, C++, ASAN, gcc-10, g++-10)	14m 55s
test (ubuntu-latest, GO, ASAN)	6m 58s
test (ubuntu-latest, GO, TSAN)	15m 24s
	4h 19m 52s

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