update(expat): version 2.6.4 #2636

Job	Run time
android-arm64-v8a-ndk-latest-cmake	8m 22s
android-arm64-v8a-ndk-cmake	8m 30s
android-armeabi-v7a-ndk-cmake	8m 33s
linux-gcc-make-armv7l	14m 4s
linux-gcc-make	24m 51s
linux-gcc-cmake	22m 18s
linux-gcc-make-asan	33m 52s
linux-gcc-make-asan-no-soo	33m 32s
linux-gcc-make-trace	24m 54s
linux-gcc-make-cxx20	33m 46s
linux-gcc-make-tsan	27m 41s
linux-gcc-make-ubsan	39m 9s
linux-emscripten-cmake	4m 51s
linux-gcc-cmake-unbundled	22m 16s
linux-gcc-make-cross-armhf	14m 27s
macos-clang-cmake-openssl3	26m 29s
macos-clang-cmake-openssl3-visibility-hidden	24m 46s
macos-clang-make	34m 46s
macos-clang-make-visibility-hidden	48m 32s
linux-gcc-make-mongodb	7m 38s
linux-gcc-make-mysql	7m 24s
linux-gcc-make-odbc	12m 52s
linux-gcc-make-postgres	7m 23s
linux-gcc-make-redis	7m 8s
macos-clang-make-openssl3-asan	44m 53s
macos-clang-make-openssl3-tsan	24m 30s
macos-clang-make-openssl3-ubsan	45m 12s
windows-2022-msvc-buildwin-x64	36m 38s
windows-2022-msvc-cmake	23m 35s
linux-gcc-make-sqlite-no-sqlparser	7m 34s
	11h 20m 26s

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