Fixed the expected value in the acctest brought by the AWS API change

Author: tabito-hara

internal/service/opensearch/package_test.go

@@ -33,7 +33,7 @@ func TestAccOpenSearchPackage_basic(t *testing.T) {
 				Config: testAccPackageConfig_basic(pkgName),
 				Check: resource.ComposeAggregateTestCheckFunc(
 					testAccCheckPackageExists(ctx, resourceName),
-					resource.TestCheckResourceAttr(resourceName, "available_package_version", ""),
+					resource.TestCheckResourceAttr(resourceName, "available_package_version", "v1"),
 					resource.TestCheckResourceAttr(resourceName, "package_description", ""),
 					resource.TestCheckResourceAttrSet(resourceName, "package_id"),
 					resource.TestCheckResourceAttr(resourceName, "package_name", pkgName),