README: fix release target name in docs

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-docs/-/merge_requests/94>

diff --git a/README.md b/README.md
index bbaef17..bc4e563 100644 (file)
--- a/README.md
+++ b/README.md
@@ -63,7 +63,7 @@ gio open build/subprojects/gst-docs/GStreamer-doc/html/index.html
 You can also generate a release tarball of the portal with:
 
 ```
-ninja -C build gst-docs@release
+ninja -C build gst-docs@@release
 ```
 
 ### Adding a newly written plugin to the documentation