Update dependency fluxcd/flux2 to v0.31.5

This MR contains the following updates:

Package	Update	Change
fluxcd/flux2	patch	v0.31.4 -> v0.31.5

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Release Notes

fluxcd/flux2

v0.31.5

Compare Source

Highlights

Flux v0.31.5 is a patch release that comes with fixes. Users are encouraged to upgrade for the best experience.

Fixes

• Fix ImageRepository public repository scan for unconfigured provider registries

Improvements

• Improve Helm OCI Chart to work with registries that don't support listing tags

Component changelog

• source-controller v0.25.11
• image-reflector-controller v0.19.4

CLI Changelog

• MR #​2932 - @​fluxcdbot - Update toolkit components
• MR #​2917 - @​morancj - SRCINFO: fix path

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