ORC-1781: Upgrade `zstd-jni` to 1.5.6-6 #4234

Job	Run time
C++ format check	8m 33s
Docker debian11	19m 28s
Javadoc generation	2m 0s
Docker debian12	20m 6s
Java 17 and clang++ on ubuntu-22.04	20m 46s
Docker ubuntu24	19m 5s
License Check	32s
Java 21 and clang++ on ubuntu-22.04	19m 36s
C++ Test on macOS (13)	8m 55s
Docker fedora37	18m 44s
Java 17 and clang++ on ubuntu-24.04	21m 24s
C++ Test on macOS (14)	6m 7s
Docker oraclelinux9	19m 43s
SIMD programming using C++ intrinsic functions on ubuntu-22.04	8m 31s
Java 21 and clang++ on ubuntu-24.04	21m 28s
Java 17 and clang++ on macos-13	32m 31s
C++ General Test on Windows	6m 12s
Java 21 and clang++ on macos-13	31m 4s
C++ AVX512 Test on Windows	5m 44s
Java 17 and clang++ on macos-14	16m 22s
Java 21 and clang++ on macos-14	15m 58s
Java 17 and g++ on ubuntu-22.04	20m 42s
	5h 43m 31s

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