CI: run install [skip ci]

Signed-off-by: Kakadu <[email protected]>

.github/workflows/blank.yml

@@ -37,5 +37,5 @@ jobs:
       - run: opam depext Lama.dev --yes --with-test
       - run: opam install . --deps-only --with-test
       - run: eval $(opam env)
-      - run: opam exec -- make
+      - run: opam exec -- make install
       - run: opam exec -- make regression