docs(ec2-alpha): fix typos (#32878)

### Issue # (if applicable)

None

### Reason for this change

Fixed typos in code comments.

### Checklist
- [x] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

packages/@aws-cdk/aws-ec2-alpha/lib/route.ts

@@ -329,7 +329,7 @@ export class VPNGatewayV2 extends Resource implements IRouteTarget {
   private readonly _attachment: CfnVPCGatewayAttachment;
 
   /**
-   * The VPN Gateway Route Propogation
+   * The VPN Gateway Route Propagation
    */
   private readonly _routePropagation: CfnVPNGatewayRoutePropagation;
 
@@ -696,7 +696,7 @@ export class Route extends Resource implements IRouteV2 {
   public readonly routeTable: IRouteTable;
 
   /**
-   * The type of router the route is targetting
+   * The type of router the route is targeting
    */
   public readonly targetRouterType: RouterType;
 

packages/@aws-cdk/aws-ec2-alpha/test/vpc-add-method.test.ts

@@ -365,7 +365,7 @@ describe('Vpc V2 with full control', () => {
     });
   });
 
-  test('Check vpngateway has routePropogation for input subnets', () => {
+  test('Check vpngateway has route Propagation for input subnets', () => {
     myVpc.enableVpnGatewayV2({
       type: VpnConnectionType.IPSEC_1,
       vpnRoutePropagation: [{ subnetType: SubnetType.PUBLIC }],
@@ -382,7 +382,7 @@ describe('Vpc V2 with full control', () => {
     });
   });
 
-  test('Throws error when no subnet identified for route propogation', () => {
+  test('Throws error when no subnet identified for route propagation', () => {
     expect(() => {
       myVpc.enableVpnGatewayV2({
         type: VpnConnectionType.IPSEC_1,