various: replace alpha.de links with repo-default

Author: classabbyamp

Diff for: _config.yml

@@ -24,5 +24,5 @@ defaults:
     values:
       is_post: true # automatically set is_post=true for all posts
 
-download_mirror: https://alpha.de.repo.voidlinux.org/live/current
+download_mirror: https://repo-default.voidlinux.org/live/current
 download_build_date: 2021-09-30

Diff for: _posts/2018-11-12-new-images.markdown

@@ -38,5 +38,5 @@ chroot and are available for all architectures we currently compile
 for.
 
 You can find all images and rootfs tarballs at
-[https://alpha.de.repo.voidlinux.org/live/current](https://alpha.de.repo.voidlinux.org/live/current),
+[https://repo-default.voidlinux.org/live/current](https://repo-default.voidlinux.org/live/current),
 or in the /live/current directory on any mirror near you.

Diff for: _posts/2020-10-01-hacktoberfest.markdown

@@ -53,7 +53,7 @@ problems in the past with people adding packages and then abandoning
 them, so expect to meet significant resistance if you are a new
 contributor trying to add a package to the repo.  Updating packages is
 very easy.  You can select a package from the list of [out of date
-packages](http://alpha.de.repo.voidlinux.org/void-updates/void-updates.txt)
+packages](http://repo-default.voidlinux.org/void-updates/void-updates.txt)
 and update it using the tools in the [void-packages
 repo](https://github.com/void-linux/void-packages).  The
 [manual](https://github.com/void-linux/void-packages/blob/master/Manual.md)

Diff for: _posts/2021-09-23-hacktoberfest.markdown

@@ -12,7 +12,7 @@ selection of packages and make sure your system remains up to date.
 
 Updating packages is very easy.  You can select a package from the
 list of [out of date
-packages](http://alpha.de.repo.voidlinux.org/void-updates/void-updates.txt)
+packages](http://repo-default.voidlinux.org/void-updates/void-updates.txt)
 and update it using the tools in the [void-packages
 repo](https://github.com/void-linux/void-packages).  The
 [manual](https://github.com/void-linux/void-packages/blob/master/Manual.md)