Fixed typo "resouce group"→"resource group" (#20664)

https://learn.microsoft.com/en-us/powershell/module/az.dnsresolver/get-azdnsforwardingruleset?view=azps-9.3.0
https://github.com/Azure/azure-powershell/blob/main/src/DnsResolver/help/Get-AzDnsForwardingRuleset.md
#PingMSFTDocs

Author: hyoshioka0128

src/DnsResolver/help/Get-AzDnsForwardingRuleset.md

@@ -78,7 +78,7 @@ westus2  dnsForwardingRuleset Microsoft.Network/dnsForwardingRulesets "04005592-
 
 This command gets single DNS forwarding ruleset by name.
 
-### Example 3: List all DNS forwarding ruleset under the resouce group
+### Example 3: List all DNS forwarding ruleset under the resource group
 ```powershell
 Get-AzDnsForwardingRuleset -ResourceGroupName sampleRG
 ```
@@ -91,7 +91,7 @@ westus2  pw-dnsForwardingRuleset  Microsoft.Network/dnsForwardingRulesets "08009
 westus2  pw-dnsForwardingRuleset1 Microsoft.Network/dnsForwardingRulesets "08007ccc-0000-0800-0000-60e3846a0000"
 ```
 
-This command gets all DNS forwarding ruleset under the resouce group.
+This command gets all DNS forwarding ruleset under the resource group.
 
 ### Example 4: List all DNS forwarding ruleset under the virtual network
 ```powershell