Version updates

gitops-kaisers-info/templates/cert-manager.yaml

   source:
     chart: "cert-manager"
     repoURL: "https://charts.jetstack.io"
-    targetRevision: "1.7.1"
+    targetRevision: "1.8.0"
     helm:
       releaseName: cert-manager
 ---

gitops-kaisers-info/templates/crossplane.yaml

   source:
     chart: crossplane
     repoURL: https://charts.crossplane.io/stable
-    targetRevision: 1.6.4
+    targetRevision: 1.8.1

gitops-kaisers-info/templates/gitea.yaml

       - CreateNamespace=true
   source:
     repoURL: "https://dl.gitea.io/charts"
-    targetRevision: "5.0.1"
+    targetRevision: "5.0.8"
     chart: "gitea"
     helm:
       version: "v3"