Fix messed up links in CHANGELOG.md (#1084)

CHANGELOG.md

@@ -2,15 +2,15 @@
 
 ## Version `v0.23.2`
 
-* ![Bugfix][badge-bugfix] Empty Markdown headings no longer cause Documenter to crash. ([#1081](github-1081), [#1082](github-1082))
+* ![Bugfix][badge-bugfix] Empty Markdown headings no longer cause Documenter to crash. ([#1081][github-1081], [#1082][github-1082])
 
 ## Version `v0.23.1`
 
-* ![Bugfix][badge-bugfix] Documenter no longer throws an error if the provided `EditURL` argument is missing. ([#1076](github-1076), [#1077](github-1077))
+* ![Bugfix][badge-bugfix] Documenter no longer throws an error if the provided `EditURL` argument is missing. ([#1076][github-1076], [#1077][github-1077])
 
-* ![Bugfix][badge-bugfix] Non-standard Markdown AST nodes no longer cause Documenter to exit with a missing method error in doctesting and HTML output. Documenter falls back to `repr()` for such nodes. ([#1073](github-1073), [#1075](github-1075))
+* ![Bugfix][badge-bugfix] Non-standard Markdown AST nodes no longer cause Documenter to exit with a missing method error in doctesting and HTML output. Documenter falls back to `repr()` for such nodes. ([#1073][github-1073], [#1075][github-1075])
 
-* ![Bugfix][badge-bugfix] Docstrings parsed into nested `Markdown.MD` objects are now unwrapped correctly and do not cause Documenter to crash with a missing method error anymore. The user can run into that when reusing docstrings with the `@doc @doc(foo) function bar end` pattern. ([#1075](github-1075))
+* ![Bugfix][badge-bugfix] Docstrings parsed into nested `Markdown.MD` objects are now unwrapped correctly and do not cause Documenter to crash with a missing method error anymore. The user can run into that when reusing docstrings with the `@doc @doc(foo) function bar end` pattern. ([#1075][github-1075])
 
 ## Version `v0.23.0`