readme/ci: screenshot the adjective-collocates slide (ca.png) instead of the dropped lvc slide

Change-Id: Ib74abdc3d15440c74f01ab94058fd5c733c8b7ca
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 1545827..9838b4d 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -89,7 +89,7 @@
       render('examples/ids.Rmd',
       output_format='revealjs.ids::revealjs_presentation', output_dir='target')"
     - ./ci/screenshot file://`pwd`/target/ids.html target/title.png
-      file://`pwd`/target/ids.html#/light-verb-constructions target/lvc.png
+      file://`pwd`/target/ids.html#/adjective-collocates target/ca.png
       file://`pwd`/target/ids.html#/registered-users target/users.png
       file://`pwd`/target/ids.html#/references-1 target/references.png
     - end_section render