set to prelease for releases via actions

Author: James Bradbury

.github/workflows/release.yml

@@ -90,6 +90,6 @@ jobs:
           name: ${{ needs.macbuild.outputs.version }}
           body: "This is a release build of the FluCoMa Max package. The build hash is ${{ github.sha }}"
           files: FluCoMa*.zip
-          prerelease: false
+          prerelease: true
           tag_name: ${{ needs.macbuild.outputs.version }}
           draft: false