Adjust some documentations titles (#23941)

As title.

docs/content/doc/usage/agit-support.en-us.md

@@ -1,6 +1,6 @@
 ---
 date: "	2022-09-01T20:50:42+0000"
-title: "Usage: Agit Setup"
+title: "Agit Setup"
 slug: "agit-setup"
 weight: 12
 toc: false

docs/content/doc/usage/issue-pull-request-templates.en-us.md

@@ -1,6 +1,6 @@
 ---
 date: "2018-05-10T16:00:00+02:00"
-title: "Usage: Issue and Pull Request templates"
+title: "Issue and Pull Request templates"
 slug: "issue-pull-request-templates"
 weight: 15
 toc: false

docs/content/doc/usage/labels.en-us.md

@@ -1,6 +1,6 @@
 ---
 date: "2023-03-04T19:00:00+00:00"
-title: "Usage: Labels"
+title: "Labels"
 slug: "labels"
 weight: 13
 toc: false

docs/content/doc/usage/linked-references.en-us.md

@@ -1,6 +1,6 @@
 ---
 date: "2019-11-21T17:00:00-03:00"
-title: "Usage: Automatically Linked References"
+title: "Automatically Linked References"
 slug: "automatically-linked-references"
 weight: 15
 toc: false

docs/content/doc/usage/merge-message-templates.en-us.md

@@ -1,6 +1,6 @@
 ---
 date: "2022-08-31T17:35:40+08:00"
-title: "Usage: Merge Message templates"
+title: "Merge Message templates"
 slug: "merge-message-templates"
 weight: 15
 toc: false

docs/content/doc/usage/pull-request.en-us.md

@@ -1,6 +1,6 @@
 ---
 date: "2018-06-01T19:00:00+02:00"
-title: "Usage: Pull Request"
+title: "Pull Request"
 slug: "pull-request"
 weight: 13
 toc: false

docs/content/doc/usage/pull-request.zh-tw.md

@@ -1,6 +1,6 @@
 ---
 date: "2018-06-01T19:00:00+02:00"
-title: "使用: 合併請求"
+title: "合併請求"
 slug: "pull-request"
 weight: 13
 toc: false

docs/content/doc/usage/push-options.en-us.md

@@ -1,6 +1,6 @@
 ---
 date: "2020-07-06T16:00:00+02:00"
-title: "Usage: Push Options"
+title: "Push Options"
 slug: "push-options"
 weight: 15
 toc: false

docs/content/doc/usage/push-options.zh-tw.md

@@ -1,6 +1,6 @@
 ---
 date: "2020-07-06T16:00:00+02:00"
-title: "使用: Push Options"
+title: "Push Options"
 slug: "push-options"
 weight: 15
 toc: false

docs/content/doc/usage/push-to-create.en-us.md

@@ -1,6 +1,6 @@
 ---
 date: "2020-07-06T16:00:00+02:00"
-title: "Usage: Push To Create"
+title: "Push To Create"
 slug: "push-to-create"
 weight: 15
 toc: false