Revert "Move to 2.6.0 (#836)"

This reverts commit e4508b7.

.github/workflows/deploy.yml

@@ -2,7 +2,7 @@ name: Publish docs via GitHub Pages
 on:
   push:
     branches:
-      - 2.6.0
+      - master
 
 jobs:
   deploy:
@@ -35,10 +35,9 @@ jobs:
         run: |
           mike list
           
-      - name: Mike Deploy
+      - name: Mike Deploy master
         run: |
-          mike deploy 2.6.0 -p --rebase
-          mike set-default 2.6.0 -p --rebase
+          mike deploy master -p --rebase
           mike list
 
       # - name: Deploy

mkdocs.yml

@@ -3,7 +3,7 @@ site_name: Nebula Graph Database Manual
 site_description: Documentation for Nebula Graph Database
 site_author: Nebula Graph
 site_url: https://docs.nebula-graph.io/
-edit_uri: 'edit/2.6.0/docs-2.0/'
+edit_uri: 'edit/master/docs-2.0/'
 docs_dir: docs-2.0
 
 # repository
@@ -21,8 +21,8 @@ theme:
     favicon: 'assets/images/favicon.ico'
     palette:
       - scheme: default
-        primary: brown
-        accent: deep orange
+        primary: teal
+        accent: green
         toggle:
           icon: material/toggle-switch-off-outline
           name: Switch to dark mode
@@ -43,12 +43,12 @@ extra_css:
   - stylesheets/extra.css
 extra:
   nebula:
-    release: 2.6.0
+    release: master
     nightly: nightly
     master: master
     base20: 2.0
     base200: 2.0.0
-    branch: v2.6.0
+    branch: master
   version:
     method: mike
   social:
@@ -491,7 +491,7 @@ plugins:
 
   - with-pdf:
       copyright: 2021 Vesoft Inc.
-      cover_subtitle: 2.6.0
+      cover_subtitle: master since v2.5.1
       author: Min Wu, Yao Zhou, Cooper Liang, Foesa Yang, Max Zhu, Abby Huang
       cover: true
       back_cover: true