redirect bugs not for ProGit2 with config.yml file

This config.yml file adds extra links on the issue select screen on
GitHub. This way we can redirect bug reports that are not for the
ProGit 2 project in a visual way, instead of relying on users
reading a wall of Markdown commented text.

.github/ISSUE_TEMPLATE/bug_report.md

@@ -13,10 +13,6 @@ assignees: ''
 <!-- * This bug is about the Pro Git book, version 2, English language. -->
 <!-- * This bug is about the book as found on the [website](https://www.git-scm.com/book/en/v2) or the pdf. -->
 <!-- * If you found an issue in the pdf/epub/mobi files, you've checked if the problem is also present in the Pro Git book on the [website](https://www.git-scm.com/book/en/v2). -->
-<!-- * This bug is **not** about a translation, if so please file a bug with the translation project. You can find a table of translation projects here: [progit2/TRANSLATING.md](https://github.com/progit/progit2/blob/master/TRANSLATING.md) -->
-<!-- * This bug is **not** about the git-scm.com site, if so please file a bug here: [git-scm.com/issues/new](https://github.com/git/git-scm.com/issues/new) -->
-<!-- * This bug is **not** about git the program itself, if so please file a bug here: [git-scm.com/community](https://git-scm.com/community) -->
-<!-- * This bug is **not** about Git for Windows, if so please file a bug here: [git-for-windows/git](https://github.com/git-for-windows/git). -->
 
 **Which version of the book is affected?**
 <!-- It's important for us to know if the problem is in the source or in the tooling for the pdf/epub/mobi files. -->

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,16 @@
+contact_links:
+  - name: Translation bug
+    url: https://github.com/progit/progit2/blob/master/TRANSLATING.md
+    about: Refer to this table to find out where to report translation bugs.
+
+  - name: Report bugs for git-scm.com site
+    url: https://github.com/git/git-scm.com/issues/
+    about: Please report problems with the git-scm.com site here.
+
+  - name: Bug is about Git program itself
+    url: https://git-scm.com/community
+    about: Please report problems with the Git program here.
+
+  - name: Bug is about Git for Windows
+    url: https://github.com/git-for-windows/git/issues
+    about: Please report problems with Git for Windows here.