Update quay.io/argoproj/argocd Docker tag to v2.8.4

This MR contains the following updates:

Package	Type	Update	Change
quay.io/argoproj/argocd	ironbank-docker	patch	v2.8.3 -> v2.8.4
quay.io/argoproj/argocd		patch	v2.8.3 -> v2.8.4
quay.io/argoproj/argocd	stage	patch	v2.8.3 -> v2.8.4

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Release Notes

argoproj/argo-cd

v2.8.4

Compare Source

Quick Start

Non-HA:

kubectl create namespace argocd
kubectl apply -n argocd -f https://raw.githubusercontent.com/argoproj/argo-cd/v2.8.4/manifests/install.yaml

HA:

kubectl create namespace argocd
kubectl apply -n argocd -f https://raw.githubusercontent.com/argoproj/argo-cd/v2.8.4/manifests/ha/install.yaml

Release Signatures and Provenance

All Argo CD container images are signed by cosign. A Provenance is generated for container images and CLI binaries which meet the SLSA Level 3 specifications. See the documentation on how to verify.

Upgrading

If upgrading from a different minor version, be sure to read the upgrading documentation.

Changelog

Full Changelog: https://github.com/argoproj/argo-cd/compare/v2.8.3...v2.8.4

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