chore: bump up version to 2.6.0-rc.1 (#3998)

#### What this PR does / why we need it:

修改版本号，准备发布 2.6.0-rc.1。

#### Does this PR introduce a user-facing change?

```release-note
None
```

console/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@halo-dev/console",
-  "version": "2.5.1",
+  "version": "2.6.0-rc.1",
   "scripts": {
     "prepare": "cd .. && husky install console/.husky",
     "dev": "vite --host",

console/packages/api-client/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@halo-dev/api-client",
-  "version": "2.5.1",
+  "version": "2.6.0-rc.1",
   "description": "",
   "scripts": {
     "build": "unbuild",

console/packages/shared/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@halo-dev/console-shared",
-  "version": "2.5.1",
+  "version": "2.6.0-rc.1",
   "description": "",
   "files": [
     "dist"