Fix stacktrace.asciidoc link

doc/faq.asciidoc

@@ -105,7 +105,7 @@ Is there an adblocker?::
     https://blog.mozilla.org/nnethercote/2014/05/14/adblock-pluss-effect-on-firefoxs-memory-usage/[RAM
     usage], so implementing support for AdBlockPlus-like lists is currently not
     a priority.
-    
+
 How can I get No-Script-like behavior?::
     To disable JavaScript by default:
 +
@@ -160,11 +160,11 @@ What is the difference between bookmarks and quickmarks?::
     Bookmarks will always use the title of the website as their name, but with quickmarks
     you can set your own title.
 +
-For example, if you bookmark multiple food recipe websites and use `:open`, 
+For example, if you bookmark multiple food recipe websites and use `:open`,
 you have to type the title or address of the website.
 +
 When using quickmark, you can give them all names, like
-`foodrecipes1`, `foodrecipes2` and so on. When you type 
+`foodrecipes1`, `foodrecipes2` and so on. When you type
 `:open foodrecipes`, you will see a list of all the food recipe sites,
 without having to remember the exact website title or address.
 
@@ -258,7 +258,7 @@ Note that there are some missing features which you may run into:
   See https://wiki.greasespot.net/Metadata_Block[the wiki] for more info.
 . Any greasemonkey API function to do with adding UI elements is not currently
   supported. That means context menu extentensions and background pages.
-    
+
 == Troubleshooting
 
 Unable to view flash content.::
@@ -279,12 +279,12 @@ When using QtWebEngine, qutebrowser reports "Render Process Crashed" and the con
     As stated in https://gcc.gnu.org/gcc-6/changes.html[GCC's Website] GCC 6 has introduced some optimizations that could break non-conforming codebases, like QtWebEngine. +
     As a workaround, you can disable the nullpointer check optimization by adding the -fno-delete-null-pointer-checks flag while compiling. +
     On gentoo, you just need to add it into your make.conf, like this: +
-    
+
     CFLAGS="... -fno-delete-null-pointer-checks"
     CXXFLAGS="... -fno-delete-null-pointer-checks"
 +
 And then re-emerging qtwebengine with: +
-    
+
     emerge -1 qtwebengine
 
 Unable to view DRM content (Netflix, Spotify, etc.).::
@@ -315,5 +315,5 @@ My issue is not listed.::
     https://github.com/qutebrowser/qutebrowser/issues[the issue tracker] or
     using the `:report` command.
     If you are reporting a segfault, make sure you read the
-    link:stacktrace.asciidoc[guide] on how to report them with all needed
+    link:stacktrace.html[guide] on how to report them with all needed
     information.