Update test-file.md

Author: Rabia2219

docs/known-issues-and-solutions/solutions-index/test-file.md

@@ -14,7 +14,7 @@
 
 ??? Info "Click to see WAVE Tool Reference"
 
-    This content added 2026-02-26. Check for updated guidance at: <a href="https://wave.webaim.org/api/docs?format=html#label_orphaned">https://wave.webaim.org/api/docs?format=html#label_orphaned</a>
+    This content added 2026-02-26. Check for updated guidance at: <a href="https://wave.webaim.org/api/docs?format=html#label_orphaned" target="_blank">https://wave.webaim.org/api/docs?format=html#label_orphaned</a>
 
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