fix(test): add missing diagnostics header to allowImplicitInvalid.js

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

crates/biome_js_analyze/tests/specs/suspicious/useIterableCallbackReturn/allowImplicitInvalid.js

@@ -1,3 +1,5 @@
+// should generate diagnostics
+
 // some paths return values, others fall through without any return
 [1, 2, 3].map((x) => {
     if (x > 2) return x;

crates/biome_js_analyze/tests/specs/suspicious/useIterableCallbackReturn/allowImplicitInvalid.js.snap

@@ -1,10 +1,11 @@
 ---
 source: crates/biome_js_analyze/tests/spec_tests.rs
-assertion_line: 154
 expression: allowImplicitInvalid.js
 ---
 # Input
 ```js
+// should generate diagnostics
+
 // some paths return values, others fall through without any return
 [1, 2, 3].map((x) => {
     if (x > 2) return x;
@@ -20,31 +21,31 @@ expression: allowImplicitInvalid.js
 
 # Diagnostics
 ```
-allowImplicitInvalid.js:2:11 lint/suspicious/useIterableCallbackReturn ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+allowImplicitInvalid.js:4:11 lint/suspicious/useIterableCallbackReturn ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
 
   × This callback passed to map() iterable method should always return a value.
 
-    1 │ // some paths return values, others fall through without any return
-  > 2 │ [1, 2, 3].map((x) => {
+    3 │ // some paths return values, others fall through without any return
+  > 4 │ [1, 2, 3].map((x) => {
       │           ^^^
-    3 │     if (x > 2) return x;
-    4 │     // falls through - likely a bug
+    5 │     if (x > 2) return x;
+    6 │     // falls through - likely a bug
 
   i Add missing return statements so that this callback returns a value on all execution paths.
 
 
 ```
 
 ```
-allowImplicitInvalid.js:8:11 lint/suspicious/useIterableCallbackReturn ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+allowImplicitInvalid.js:10:11 lint/suspicious/useIterableCallbackReturn ━━━━━━━━━━━━━━━━━━━━━━━━━━━━
 
   × This callback passed to map() iterable method should always return a value.
 
-     7 │ // no returns at all
-   > 8 │ [1, 2, 3].map((x) => {
+     9 │ // no returns at all
+  > 10 │ [1, 2, 3].map((x) => {
        │           ^^^
-     9 │     console.log(x);
-    10 │ });
+    11 │     console.log(x);
+    12 │ });
 
   i Add a return with a value to this callback.