Update dependency igbinary/igbinary to v3.2.9

This MR contains the following updates:

Package	Type	Update	Change
igbinary/igbinary	ironbank-github	patch	3.2.7 -> 3.2.9

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Release Notes

igbinary/igbinary

v3.2.9

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• Fix invalid release artifact name in job to build dlls for https://github.com/igbinary/igbinary

v3.2.8

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• Reduce excessive inlining to reduce shared library size.
• Miscellaneous optimizations.
• Update test expectations to handle changes to var_export output (fully qualified class names) in PHP 8.2.
• Throw an Error when igbinary_unserialize would add dynamic properties to class definitions that forbid them in PHP 8.0+ (especially PHP 8.2 readonly classes)
• Emit a deprecation notice when igbinary_unserialize() adds dynamic properties to a class without #[AllowDynamicProperties] in PHP 8.2. Doing that would become an Error in PHP 9.0.
• Set up CI job to build dlls on https://github.com/igbinary/igbinary - at the moment, the infrastructure used by the Windows for php team has been broken for months.

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