fix(css/parser): Fix infinite loop about @import and layer (#5919)

crates/swc_css_parser/src/parser/at_rule.rs

@@ -1868,6 +1868,8 @@ where
         let start = self.input.cur_span().lo;
         let mut name = vec![];
 
+        let entered = is!(self, Ident);
+
         while is!(self, Ident) {
             let span = self.input.cur_span();
             let token = bump!(self);
@@ -1889,6 +1891,11 @@ where
             }
         }
 
+        if !entered {
+            // if first argument is not ident, without bump! will cause infinite loop
+            bump!(self);
+        }
+
         Ok(LayerName {
             name,
             span: span!(self, start),