docs: normalised versions and explained releases (#4119)

* docs: normalised versions and explained releases

* added downoad links

* fix: corrected tar flag for linux

Co-authored-by: Florian Forster <florian@caos.ch>

deploy/knative/zitadel-knative-service.yaml

@@ -7,7 +7,7 @@ spec:
   template:
     metadata:
       annotations:
-        client.knative.dev/user-image: ghcr.io/zitadel/zitadel:v2.0.0-amd64
+        client.knative.dev/user-image: ghcr.io/zitadel/zitadel:stable
       creationTimestamp: null
     spec:
       containerConcurrency: 0
@@ -28,7 +28,7 @@ spec:
           value: 80
         - name: ZITADEL_EXTERNALDOMAIN
           value: zitadel.default.127.0.0.1.sslip.io
-        image: ghcr.io/zitadel/zitadel:v2.0.0-amd64
+        image: ghcr.io/zitadel/zitadel:stable
         name: user-container
         ports:
         - containerPort: 8080