[libhandy/wip/exalm/parallel-install] doc: Make parallel-installatable with libhandy 0.x

[Alexander Mikhaylenko <alexm src gnome org>]

commit c0a5be4f1e72d6032edb66c8dc56f691b9f34805
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Tue May 26 21:14:17 2020 +0500

    doc: Make parallel-installatable with libhandy 0.x
    
    Use libhandy-1 name instead of libhandy.
    
    Fixes a part of https://gitlab.gnome.org/GNOME/libhandy/-/issues/278
    
    Signed-off-by: Alexander Mikhaylenko <alexm gnome org>

 doc/meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/doc/meson.build b/doc/meson.build
index 847a6338..a235180a 100644
--- a/doc/meson.build
+++ b/doc/meson.build
@@ -65,7 +65,7 @@ gnome.gtkdoc('libhandy',
                        '--extra-dir=@0@'.format(glib_docpath / 'gtk3'),
                        '--extra-dir=@0@'.format(glib_docpath / 'gdk-pixbuf'),
                      ],
-        install_dir: 'libhandy',
+        install_dir: 'libhandy-' + apiversion,
       content_files: content_files,
         html_assets: images,
             install: true)