Update Helm chart emqx to 5.8.4

[renovate]

This PR contains the following updates:

Package	Update	Change
emqx	patch	5.8.3 -> 5.8.4

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[bloopy-boi]

Path: cluster/apps/home/emqx/helm-release.yaml
Version: 5.8.3 -> 5.8.4

@@ -195,11 +195,11 @@
 metadata:
 labels:
 app: emqx
- version: 5.8.3
+ version: 5.8.4
 app.kubernetes.io/name: emqx
 app.kubernetes.io/instance: emqx
 annotations:
- checksum/config: "b7b2d1b0943c69875324c9b275506de1776e9e957ad5749473e6098088fff568"
+ checksum/config: "c755bec53ad9a391626356868a52f8f309c169339abca31092f56139f4c1aa79"
 spec:
 serviceAccountName: emqx
 volumes:
@@ -219,7 +219,7 @@
 - 1000
 containers:
 - name: emqx
- image: "emqx/emqx:5.8.3"
+ image: "emqx/emqx:5.8.4"
 imagePullPolicy: IfNotPresent
 securityContext:
 runAsNonRoot: true

[bloopy-boi]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ COPYPASTE	jscpd	yes		no	1.04s
✅ YAML	prettier	1	1	0	0.41s
✅ YAML	yamllint	1		0	0.29s

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