actions: uploader: Don't clean after build

We currently clean the build immediately after building the zip-file, which
has worked up until this point because our zip-file.clean target wasn't
actually correctly cleaning up the zip file. Now that the zip-file.clean
target is fixed running `make zip-file clean` is nonsensical since it
immediately deletes the just-built zip file.

Drop the clean invocation so that our zip file doesn't get nuked.

actions/uploader/run.sh

@@ -7,7 +7,7 @@ set -e
     exit 1
 }
 git config --global --add safe.directory /github/workspace
-make zip-file clean
+make zip-file
 export USERNAME
 export PASSWORD
 export ZIPBALL=./dist/[email protected]