examples : fix underscore in beam-search + .gitignore (close #2900)

examples/CMakeLists.txt

@@ -25,7 +25,7 @@ else()
     add_subdirectory(simple)
     add_subdirectory(embd-input)
     add_subdirectory(llama-bench)
-    add_subdirectory(beam_search)
+    add_subdirectory(beam-search)
     if (LLAMA_METAL)
         add_subdirectory(metal)
     endif()

examples/beam-search/CMakeLists.txt

@@ -1,5 +1,5 @@
-set(TARGET beam_search)
-add_executable(${TARGET} beam_search.cpp)
+set(TARGET beam-search)
+add_executable(${TARGET} beam-search.cpp)
 install(TARGETS ${TARGET} RUNTIME)
 target_link_libraries(${TARGET} PRIVATE common llama ${CMAKE_THREAD_LIBS_INIT})
 target_compile_features(${TARGET} PRIVATE cxx_std_11)