Fix Download page style (#10)

* Add href

* Fix doc

* Modify some styles

Co-authored-by: roryqi <roryqi@tencent.com>
diff --git a/download/index.md b/download/index.md
index d5bf6f7..d750aea 100644
--- a/download/index.md
+++ b/download/index.md
@@ -1,5 +1,6 @@
 ---
 title: Download
+sidebar_position: 1
 ---
 <!--
 {% comment %}
@@ -19,6 +20,7 @@
 limitations under the License.
 {% endcomment %}
 -->
+
 ## Apache Uniffle(incubating) Downloads
 
 Apache Uniffle(incubating) is released as a source artifact.
diff --git a/download/release-notes-0.6.0.md b/download/release-notes-0.6.0.md
index b0227c1..2e17309 100644
--- a/download/release-notes-0.6.0.md
+++ b/download/release-notes-0.6.0.md
@@ -1,23 +1,23 @@
 ---
 title: Release Notes 0.6.0
-sidebar_position: 10
+sidebar_position: 2
 --- 
 
 # Release Note
 
 ## Highlight
 
-Support quorum replication mechanism
+##### Support quorum replication mechanism
 
-Optimize the assignment strategy
+##### Optimize the assignment strategy
 
-Some improvements of stability and performance
+##### Some improvement of stability and performance
 
-Add a plugin mechanism of SelectStorageStrategy
+##### Add a plugin mechanism of SelectStorageStrategy
 
-A new select storage strategy called LowestIOSampleCostSelectStorageStrategy
+##### Add LowestIOSampleCostSelectStorageStrategy
 
-Support Kerberos HDFS
+##### Support Kerberos HDFS
 
 ## ChangeLog
 
@@ -141,4 +141,4 @@
 * Add Notice and DISCLAMER file by @frankliee in https://github.com/apache/incubator-uniffle/pull/215
 
 ## Credits
-The release of Uniffle 1.0.2 is inseparable from the contributors of the Uniffle community. Thanks to all the community contributors! 
\ No newline at end of file
+The release of Uniffle 0.6.0 is inseparable from the contributors of the Uniffle community. Thanks to all the community contributors! 
\ No newline at end of file