Addressed pipeline errors

Author: samarthlakhotia

src/PolicyInsights/PolicyInsights/help/Az.PolicyInsightsCmdlet.Design.md

@@ -85,7 +85,7 @@ New-AzPolicyAttestation `
     -PolicyAssignmentId $policyInitiativeAssignmentId `
     -PolicyDefinitionReferenceId $policyDefinitionReferenceId `
     -ComplianceState $Compliant `
-    -Comments $comment `
+    -Comment $comment `
     -Evidence $policyEvidence `
     -ExpiresOn $expiresOn `
     -AssessmentDate $expiresOn.AddDays(-2) `
@@ -150,7 +150,7 @@ This command gets the attestation named 'attestation1' at the resource group 'my
 + Example 3: Get 5 policy attestations in a subscription with optional filters
 ```powershell
 Set-AzContext -Subscription "MySubscription"
-Get-PolicyAttestation -Top 5 -Filter "PolicyAssignmentId eq '/subscriptions/49c37404-cef8-46b2-ba72-fa8419c82ed5/providers/Microsoft.Authorization/policyAssignments/0774f87b3af94c1399d3ee52"
+Get-AzPolicyAttestation -Top 5 -Filter "PolicyAssignmentId eq '/subscriptions/49c37404-cef8-46b2-ba72-fa8419c82ed5/providers/Microsoft.Authorization/policyAssignments/0774f87b3af94c1399d3ee52"
 ```
 
 This command gets a max of 5 policy attestations underneath the subscription named 'My Subscription'. Only policy attestations for the given policy assignment will be retrieved.
@@ -195,10 +195,10 @@ This command deletes the attestation named 'attestation1' in subscription "My Su
 ```powershell
 $rgName = "myRG"
 
-Get-PolicyAttestation -Name "attestation2" -ResourceGroupName $rgName | Remove-AzPolicyAttestation
+Get-AzPolicyAttestation -Name "attestation2" -ResourceGroupName $rgName | Remove-AzPolicyAttestation
 ```
 
-This command deletes the attestation named 'attestation2' at resource group 'myRG' using input object given by the **Get-PolicyAttestation** cmdlet.
+This command deletes the attestation named 'attestation2' at resource group 'myRG' using input object given by the **Get-AzPolicyAttestation** cmdlet.
 
 + Example 3: Delete a policy remediation using ResourceId.
 ```powershell

src/PolicyInsights/PolicyInsights/help/Get-AzPolicyAttestation.md

@@ -64,7 +64,7 @@ This command gets the attestation named 'attestation1' at the resource group 'my
 ### Example 3: Get 5 policy attestations in a subscription with optional filters
 ```powershell
 Set-AzContext -Subscription "MySubscription"
-Get-PolicyAttestation -Top 5 -Filter "PolicyAssignmentId eq '/subscriptions/49c37404-cef8-46b2-ba72-fa8419c82ed5/providers/Microsoft.Authorization/policyAssignments/0774f87b3af94c1399d3ee52"
+Get-AzPolicyAttestation -Top 5 -Filter "PolicyAssignmentId eq '/subscriptions/49c37404-cef8-46b2-ba72-fa8419c82ed5/providers/Microsoft.Authorization/policyAssignments/0774f87b3af94c1399d3ee52"
 ```
 
 This command gets a max of 5 policy attestations underneath the subscription named 'My Subscription'. Only policy attestations for the given policy assignment will be retrieved.

src/PolicyInsights/PolicyInsights/help/Remove-AzPolicyAttestation.md

@@ -47,10 +47,10 @@ This command deletes the attestation named 'attestation1' in subscription "My Su
 ```powershell
 $rgName = "myRG"
 
-Get-PolicyAttestation -Name "attestation2" -ResourceGroupName $rgName | Remove-AzPolicyAttestation
+Get-AzPolicyAttestation -Name "attestation2" -ResourceGroupName $rgName | Remove-AzPolicyAttestation
 ```
 
-This command deletes the attestation named 'attestation2' at resource group 'myRG' using input object given by the **Get-PolicyAttestation** cmdlet.
+This command deletes the attestation named 'attestation2' at resource group 'myRG' using input object given by the **Get-AzPolicyAttestation** cmdlet.
 
 ### Example 3: Delete a policy remediation using ResourceId.
 ```powershell