Replace absolute links with relrefs

Signed-off-by: Danila Fedorin <danila.fedorin@gmail.com>

content/blog/haskell_language_server_again.md

@@ -103,7 +103,7 @@ VSCode to autocomplete and error check.
 My original recommendations for (neo)vim remain unchanged, with the exception
 of using `ghcide` instead of `hie` in the `serverCommands` variable. You
 can find the original instructions
-[here](https://danilafe.com/blog/haskell_language_server/#neovim).
+[here]({{< relref "haskell_language_server#neovim" >}}).
 
 ### Conclusion
 I hope that using GHC IDE, you'll be able to have a significantly more pleasant