doc/md: fixed wrong sample code for gorm guide

changed doc to match atlas-provider-gorm repo

doc/md/guides/orms/gorm.md

@@ -120,21 +120,21 @@ Create a new program named `loader/main.go` with the following contents:
 package main
 
 import (
-	"io"
-    "os"
+  "io"
+  "os"
 
-    "ariga.io/atlas-provider-gorm/gormschema"
-    _ "ariga.io/atlas-provider-gorm/recordriver"
-    "github.com/<yourorg>/<yourrepo>/path/to/models"
+  "ariga.io/atlas-provider-gorm/gormschema"
+  _ "ariga.io/atlas-go-sdk/recordriver"
+  "github.com/<yourorg>/<yourrepo>/path/to/models"
 )
 
 func main() {
-    stmts, err := gormschema.New("mysql", &models.User{}, &models.Pet{}).Load()
-    if err != nil {
-        fmt.Fprintf(os.Stderr, "failed to load gorm schema: %v\n", err)
-        os.Exit(1)
-    }
-    io.WriteString(os.Stdout, stmts)
+  stmts, err := gormschema.New("mysql").Load(&models.User{}, &models.Pet{})
+  if err != nil {
+    fmt.Fprintf(os.Stderr, "failed to load gorm schema: %v\n", err)
+    os.Exit(1)
+  }
+  io.WriteString(os.Stdout, stmts)
 }
 ```