fix issue caused by blank (#15210)

Author: BethanyZhou

src/DiskPool/custom/New-AzDiskPool.ps1

@@ -182,7 +182,7 @@ param(
                 $disk = @()
                 for ($i = 0; $i -lt $DiskId.Count; $i++) {
                     $diskObject = New-Object -TypeName Microsoft.Azure.PowerShell.Cmdlets.DiskPool.Models.Api20210401Preview.Disk
-                    $diskObject.Id = $DiskId[$i]
+                    $diskObject.Id = $DiskId[$i]
                     $disk += $diskObject
                 }
                 $PSBoundParameters["Disk"] = $disk

src/DiskPool/custom/Update-AzDiskPool.ps1

@@ -160,7 +160,7 @@ param(
                 $disk = @()
                 for ($i = 0; $i -lt $DiskId.Count; $i++) {
                     $diskObject = New-Object -TypeName Microsoft.Azure.PowerShell.Cmdlets.DiskPool.Models.Api20210401Preview.Disk
-                    $diskObject.Id = $DiskId[$i]
+                    $diskObject.Id = $DiskId[$i]
                     $disk += $diskObject
                 }
                 $PSBoundParameters["Disk"] = $disk

src/DiskPool/readme.md

@@ -30,7 +30,7 @@ For information on how to develop for `Az.DiskPool`, see [how-to.md](how-to.md).
 > see https://aka.ms/autorest
 
 ``` yaml
-Branch: 418603118e704ffeabacff1dd56957400cf83f3a
+branch: 418603118e704ffeabacff1dd56957400cf83f3a
 require:
   - $(this-folder)/../readme.azure.noprofile.md
 # lock the commit