Prepare release of version 2.2.6 #256

Job	Run time
host_qemu (aarch64, gcc)	27m 30s
host_qemu (armv7, gcc)	30m 55s
host_unix (ubuntu-latest, gcc)	2m 56s
host_unix (ubuntu-latest, clang)	3m 1s
host_unix (macos-latest, clang)	1m 46s
host_unix (ubuntu-24.04-arm, gcc)	2m 50s
host_unix (macos-latest, gcc)	1m 31s
host_unix (ubuntu-24.04-arm, clang)	3m 12s
	1h 13m 41s

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