go.mod: bump AWS SDK past a breaking API change of theirs

They changed a type in their SDK which meant others using the AWS APIs
in their Go programs (with newer AWS modules in their caller go.mod)
and then depending on Tailscale (for e.g. tsnet) then couldn't compile
ipn/store/awsstore.

Thanks to @thisisaaronland for bringing this up.

Fixes #7019

Change-Id: I8d2919183dabd6045a96120bb52940a9bb27193b
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>

ipn/store/awsstore/store_aws.go

@@ -105,7 +105,7 @@ func (s *awsStore) LoadState() error {
 		context.TODO(),
 		&ssm.GetParameterInput{
 			Name:           aws.String(s.ParameterName()),
-			WithDecryption: true,
+			WithDecryption: aws.Bool(true),
 		},
 	)
 
@@ -167,7 +167,7 @@ func (s *awsStore) persistState() error {
 		&ssm.PutParameterInput{
 			Name:      aws.String(s.ParameterName()),
 			Value:     aws.String(string(bs)),
-			Overwrite: true,
+			Overwrite: aws.Bool(true),
 			Tier:      ssmTypes.ParameterTierStandard,
 			Type:      ssmTypes.ParameterTypeSecureString,
 		},