fix typo

Author: tamram

articles/storage/common/storage-encryption-keys-powershell.md

@@ -95,7 +95,7 @@ To change the key used for Azure Storage encryption, call [Set-AzStorageAccount]
 
 ## Revoke customer-managed keys
 
-f you believe that a key may have been compromised, you can revoke customer-managed keys by removing the key vault access policy. To revoke a customer-managed key, call the [Remove-AzKeyVaultAccessPolicy](/powershell/module/az.keyvault/remove-azkeyvaultaccesspolicy) command, as shown in the following example. Remember to replace the placeholder values in brackets with your own values and to use the variables defined in the previous examples.
+If you believe that a key may have been compromised, you can revoke customer-managed keys by removing the key vault access policy. To revoke a customer-managed key, call the [Remove-AzKeyVaultAccessPolicy](/powershell/module/az.keyvault/remove-azkeyvaultaccesspolicy) command, as shown in the following example. Remember to replace the placeholder values in brackets with your own values and to use the variables defined in the previous examples.
 
 ```powershell
 Remove-AzKeyVaultAccessPolicy -VaultName $keyVault.VaultName `