fix(github-release): update fluxcd/flux2 to v0.38.3

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
fluxcd/flux2	Kustomization	patch	v0.38.2 -> v0.38.3

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Release Notes

fluxcd/flux2

v0.38.3

Compare Source

Highlights

Flux v0.38.3 is a patch release that comes with fixes and small improvements to the CLI.
Users are encouraged to upgrade for the best experience.

CLI Changelog

• PR #​3476 - @​aryan9600 - Update git/gogit to v0.4.1
• PR #​3469 - @​dependabot[bot] - Bump actions/checkout from 3.2.0 to 3.3.0
• PR #​3465 - @​kingdonb - Fix fluxcd/website#​1347
• PR #​3457 - @​dependabot[bot] - Bump actions/cache from 3.0.11 to 3.2.2
• PR #​3441 - @​stefanprodan - check: Show the latest stored version of CRDs

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