ci-docs: copy the gir file before attempting to generate docs

.gitlab-ci.yml

@@ -21,6 +21,7 @@ pages:
   stage: deploy
   script:
     # generate the docs
+    - cp ./Handy-0.0.gir ./gir-files
     - cargo run --release -- -c ./libhandy/Gir.toml -d ./gir-files --doc-target-path docs.md -m doc
     - cargo install rustdoc-stripper
     - rustdoc-stripper -g -o ./libhandy/docs.md