docs(image): use images from the repository

README.md

@@ -1,6 +1,6 @@
 <p align="center">
     <a href="https://git-cliff.org">
-        <img src="https://user-images.githubusercontent.com/24392180/121790699-8808dc80-cbea-11eb-8ab6-2fb6b08b66d8.png" width="300"></a>
+        <img src="https://raw.githubusercontent.com/orhun/git-cliff/main/img/git-cliff-logo.png" width="300"></a>
     <br>
     <a href="https://github.com/orhun/git-cliff/releases">
         <img src="https://img.shields.io/github/v/release/orhun/git-cliff?style=flat&labelColor=1C2C2E&color=C96329&logo=GitHub&logoColor=white">
@@ -40,7 +40,7 @@
 
 **git-cliff** can generate [changelog](https://en.wikipedia.org/wiki/Changelog) files from the [Git](https://git-scm.com/) history by utilizing [conventional commits](https://git-cliff.org/docs/configuration#conventional_commits) as well as regex-powered [custom parsers](https://git-cliff.org/docs/configuration#commit_parsers). The [changelog template](https://git-cliff.org/docs/category/templating) can be customized with a [configuration file](https://git-cliff.org/docs/configuration) to match the desired format.
 
-![preview](https://user-images.githubusercontent.com/24392180/128637997-5713ba25-d8f3-40c7-8ba8-ea7f333ead88.png)
+![preview](https://raw.githubusercontent.com/orhun/git-cliff/main/img/git-cliff-preview.png)
 
 ## Documentation
 

website/blog/git-cliff-0.5.0.md

@@ -11,7 +11,7 @@ In this post, I'm explaining the new features in the 0.5.0 release while giving
 <center>
 
  <a href="https://github.com/orhun/git-cliff">
-    <img src="https://user-images.githubusercontent.com/24392180/146058022-494a7a28-34a9-473e-8c80-85fd7294783c.jpg" />
+    <img src="https://raw.githubusercontent.com/orhun/git-cliff/main/img/git-cliff-banner.jpg" />
 </a>
 
 </center>

website/blog/git-cliff-1.2.0.md

@@ -11,7 +11,7 @@ In this post, I'm giving a brief introduction to the new features in the 1.2.0 r
 <center>
 
  <a href="https://github.com/orhun/git-cliff">
-    <img src="https://user-images.githubusercontent.com/24392180/146058022-494a7a28-34a9-473e-8c80-85fd7294783c.jpg" />
+    <img src="https://raw.githubusercontent.com/orhun/git-cliff/main/img/git-cliff-banner.jpg" />
 </a>
 
 </center>

website/blog/git-cliff-1.3.0.md

@@ -9,7 +9,7 @@ tags:
 <center>
 
  <a href="https://github.com/orhun/git-cliff">
-    <img src="https://user-images.githubusercontent.com/24392180/146058022-494a7a28-34a9-473e-8c80-85fd7294783c.jpg" />
+    <img src="https://raw.githubusercontent.com/orhun/git-cliff/main/img/git-cliff-banner.jpg" />
 </a>
 
 </center>