Mark as prerelease

.github/workflows/build.yml

@@ -139,6 +139,7 @@ jobs:
           const tagName = '${{ steps.version.outputs.version }}';
           const repoName = `zurg${tagName.includes('-rc') || tagName.includes('-nightly') ? '' : '-testing'}`;
           const releaseName = `${tagName}`;
+          const prerelease = tagName.includes('-nightly');
 
           let lastReleaseTime;
           let hoursSinceLastRelease = 'N/A';
@@ -179,6 +180,7 @@ jobs:
             tag_name: tagName,
             name: releaseName,
             body: releaseBody,
+            prerelease: prerelease,
           });
 
           const uploadUrl = response.data.upload_url;