ci : fix xcframework artifact tag (ggml-org#12191)

The commit add the name parameter to the upload-artifact action to
ensure that the artifact is uploaded with the correct name.

The motivation for this is that currently the uploaded xcframework
is named as llama-b1-xcframework.zip. With this change the name of this
artifact should contain the build number like the other artifacts.

Author: danbev

.github/workflows/build.yml

@@ -1368,6 +1368,7 @@ jobs:
         uses: actions/upload-artifact@v4
         with:
           path: llama-${{ steps.tag.outputs.name }}-xcframework.zip
+          name: llama-${{ steps.tag.outputs.name }}-xcframework
 
   android-build:
     runs-on: ubuntu-latest