fix(minifier): mark as changed when else if was converted to if (#8837)

This PR fixes this fail in monitor-oxc.

https://github.com/oxc-project/monitor-oxc/actions/runs/13096316109/job/36539024628#step:8:14

Author: sapphi-red

crates/oxc_minifier/src/peephole/minimize_statements.rs

@@ -262,6 +262,7 @@ impl<'a> PeepholeOptimizations {
                                 if if_stmt.consequent.is_jump_statement() {
                                     if let Some(stmt) = if_stmt.alternate.take() {
                                         result.push(stmt);
+                                        self.mark_current_function_as_changed();
                                         continue;
                                     }
                                 }

crates/oxc_minifier/tests/peephole/mod.rs

@@ -76,6 +76,19 @@ fn integration() {
         console.log(c, d);
         ",
     );
+
+    test(
+        "function _() {
+            if (currentChar === '\\n')
+                return pos + 1;
+            else if (currentChar !== ' ' && currentChar !== '\\t')
+                return pos + 1;
+        }",
+        "function _() {
+            if (currentChar === '\\n' || currentChar !== ' ' && currentChar !== '\\t')
+                return pos + 1;
+        }",
+    );
 }
 
 #[test]