Fix license_file tag

Author: mcbarton

recipes/recipes_emscripten/cppinterop/recipe.yaml

@@ -27,7 +27,7 @@ about:
   home: https://github.com/compiler-research/CppInterOp
   license: Apache-2.0 WITH LLVM-exception
   license_family: Apache
-  license_file: cppinterop/LICENSE.txt
+  license_file: LICENSE.TXT
   summary: |
     The CppInterOp library provides a minimalist approach for other languages
     to interoperate with C++ entities.