chore(karpor): bump app version to 0.6.3-alpha.4, chart version to 0.7.6

Author: github-actions[bot]

charts/karpor/Chart.yaml

@@ -1,8 +1,8 @@
 apiVersion: v2
 name: karpor
-version: 0.7.5
+version: 0.7.6
 type: application
-appVersion: 0.6.3
+appVersion: 0.6.3-alpha.4
 description: A modern kubernetes visualization tool (Karpor).
 home: https://github.com/KusionStack/karpor
 icon: https://kusionstack.io/karpor/assets/logo/logo.svg