fix relative import

Author: ForsakenHarmony

packages/next-swc/crates/next-core/src/util.rs

@@ -420,9 +420,9 @@ pub async fn load_next_js_template(
             .get_relative_path_to(&imported)
             .context("path has to be relative to package root")?;
 
-        if !relative.starts_with("next/") {
+        if !relative.starts_with("./next/") {
             bail!(
-                "Invariant: Expected relative import to start with \"next/\", found \"{}\"",
+                "Invariant: Expected relative import to start with \"./next/\", found \"{}\"",
                 relative
             )
         }