Fix band calculation

Author: lewing

src/tasks/WorkloadBuildTasks/InstallWorkloadFromArtifacts.cs

@@ -296,12 +296,13 @@ private bool InstallWorkloadManifest(ITaskItem workloadId, string name, string v
             }
 
             string outputDir = FindSubDirIgnoringCase(manifestVersionBandDir, name);
+            var bandVersion = VersionBandForManifestPackages;
             // regex matching the version band, e.g. 6.0.100-preview.3.21202.5 => 6.0.100-preview.3
-            string bandVersion = bandVersionRegex().Match(version).Value;
-            // use VersionBandForManifestPackages for CI/dev builds
-            // ideally we could compare against PackageVersion but that isn't available in the task
-            if (bandVersion.EndsWith("-ci") || bandVersion.EndsWith("-dev"))
-                bandVersion = VersionBandForManifestPackages;
+            string packagePreleaseVersion = bandVersionRegex().Match(version).Groups[1].Value;
+            string bandPreleaseVersion = bandVersionRegex().Match(bandVersion).Groups[1].Value;
+
+            if (packagePreleaseVersion != bandPreleaseVersion && packagePreleaseVersion != "-dev" && packagePreleaseVersion != "-ci")
+                bandVersion = bandVersion.Replace (bandPreleaseVersion, packagePreleaseVersion);
 
             PackageReference pkgRef = new(Name: $"{name}.Manifest-{bandVersion}",
                                           Version: version,