feat: update milvus 2.6 arch and add milvus 2.6 upgrade manual

Author: richzw

ch1/ch1_3.ipynb

@@ -405,7 +405,8 @@
     "- 集群 + Operator：`upgrade_milvus_cluster-operator.md`\n",
     "- standalone + Operator：`upgrade_milvus_standalone-operator.md`\n",
     "- 集群 + Helm：`upgrade_milvus_cluster-helm.md`\n",
-    "- standalone + Helm：`upgrade_milvus_standalone-helm.md`"
+    "- standalone + Helm：`upgrade_milvus_standalone-helm.md`\n",
+    "- https://milvus.io/blog/how-to-safely-upgrade-from-milvu-2-5-x-to-milvus-2-6-x.md"
    ],
    "id": "3edfb33fd2ece613"
   },

ch1/ch1_3_en.ipynb

@@ -406,7 +406,8 @@
     "- Cluster + Operator: `upgrade_milvus_cluster-operator.md`\n",
     "- standalone + Operator: `upgrade_milvus_standalone-operator.md`\n",
     "- Cluster + Helm: `upgrade_milvus_cluster-helm.md`\n",
-    "- standalone + Helm: `upgrade_milvus_standalone-helm.md`"
+    "- standalone + Helm: `upgrade_milvus_standalone-helm.md`\n",
+    "- https://milvus.io/blog/how-to-safely-upgrade-from-milvu-2-5-x-to-milvus-2-6-x.md"
    ]
   },
   {