fix bug (#14641)

Author: VeryEarly

src/ContainerRegistry/ContainerRegistry/ChangeLog.md

@@ -18,6 +18,7 @@
         - Additional information about change #1
 -->
 ## Upcoming Release
+* Fixed bug in `Get-AzContainerRegistryManifest` showing incorrect image name 
 
 ## Version 2.2.1
 * Fixed authentication for `Connect-AzContainerRegistry`

src/ContainerRegistry/ContainerRegistry/Models/PSAcrManifest.cs

@@ -30,7 +30,7 @@ public class PSAcrManifest
         public PSAcrManifest(AcrManifests manifest)
         {
             Registry = manifest?.Registry;
-            ImageName = manifest?.Registry;
+            ImageName = manifest?.ImageName;
             if (manifest != null && manifest.ManifestsAttributes != null)
             {
                 ManifestsAttributes = manifest.ManifestsAttributes.Select(x => new PSManifestAttributeBase(x)).ToList();

src/ContainerRegistry/ContainerRegistry/help/Get-AzContainerRegistryManifest.md

@@ -38,7 +38,7 @@ Get-AzContainerRegistryManifest -RegistryName registry -RepositoryName alpine
 
 Registry                    ImageName                   ManifestsAttributes
 --------                    ---------                   -------------------
-registry.azurecr.io         registry.azurecr.io         {Microsoft.Azure.Commands.ContainerRegistry.Models.PSManifestAttributeBase, Microsoft.Azure.Comm…}
+registry.azurecr.io         alpine         {Microsoft.Azure.Commands.ContainerRegistry.Models.PSManifestAttributeBase, Microsoft.Azure.Comm…}
 ```
 
 List manifests for repository alpine under registry.
@@ -49,7 +49,7 @@ Get-AzContainerRegistryManifest -RegistryName registry -RepositoryName alpine -N
 
 Registry                    ImageName Attributes
 --------                    --------- ----------
-registry.azurecr.io alpine    Microsoft.Azure.Commands.ContainerRegistry.Models.PSManifestAttributeBase
+registry.azurecr.io         alpine    Microsoft.Azure.Commands.ContainerRegistry.Models.PSManifestAttributeBase
 ```
 
 Get manifests sha256:a5426f084c755f4d6c1d1562a2d456aa574a24a61706f6806415627360c06ac0 for repository alpine under registry.