chore(deps): update dependency fluxcd/flux2 to v0.31.4

This MR contains the following updates:

Package	Update	Change
fluxcd/flux2	patch	v0.31.3 -> v0.31.4

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Release Notes

fluxcd/flux2

v0.31.4

Compare Source

Highlights

Flux v0.31.4 is a patch release that comes with fixes. Users are encouraged to upgrade for the best experience.

Fixes

• Fix SIGSEGV when resolving charts dependencies.
• Fix Panic when no artifact in source.
• decryptor: recover from SOPS store panic.
• Fix spelling mistake in azure/exchanger.go.

Improvements

• Retry downloading artifacts on not found errors.

Components changelog

• source-controller v0.25.10
• kustomize-controller v0.26.3
• notification-controller v0.24.1
• helm-controller v0.22.2
• image-automation-controller v0.23.5
• image-reflector-controller v0.19.3

CLI Changelog

• MR #​2905 - @​fluxcdbot - Update toolkit components

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