acctest: fix a check for ARN

Author: tabito-hara

internal/service/organizations/organization_test.go

@@ -40,7 +40,7 @@ func testAccOrganization_basic(t *testing.T) {
 					resource.TestCheckResourceAttrPair(resourceName, "accounts.0.arn", resourceName, "master_account_arn"),
 					resource.TestCheckResourceAttrPair(resourceName, "accounts.0.email", resourceName, "master_account_email"),
 					resource.TestCheckResourceAttrPair(resourceName, "accounts.0.id", resourceName, "master_account_id"),
-					acctest.CheckResourceAttrGlobalARNFormat(ctx, resourceName, names.AttrARN, "organizations", "organization/o-{id}"),
+					acctest.CheckResourceAttrGlobalARNFormat(ctx, resourceName, names.AttrARN, "organizations", "organization/{id}"),
 					resource.TestCheckResourceAttr(resourceName, "aws_service_access_principals.#", "0"),
 					resource.TestCheckResourceAttr(resourceName, "feature_set", string(awstypes.OrganizationFeatureSetAll)),
 					acctest.MatchResourceAttrGlobalARN(ctx, resourceName, "master_account_arn", "organizations", regexache.MustCompile(`account/`+organizationIDRegexPattern+`/\d{12}$`)),