MLECO-3537: Fix Cmake build issue when using build-apis

* Filter ".md" entry from UC_API_LIST

Signed-off-by: Conor Kennedy <conor.kennedy@arm.com>
Change-Id: Iec0f3fd1960b4e3f9ff1b2f730befedb0143ca30
diff --git a/scripts/cmake/cmsis-pack-gen/CMakeLists.txt b/scripts/cmake/cmsis-pack-gen/CMakeLists.txt
index db5cfff..0e71bd1 100644
--- a/scripts/cmake/cmsis-pack-gen/CMakeLists.txt
+++ b/scripts/cmake/cmsis-pack-gen/CMakeLists.txt
@@ -47,6 +47,7 @@
 add_subdirectory(${API_COMMON_PROJECT_DIR} ${CMAKE_BINARY_DIR}/common)
 
 file(GLOB UC_API_LIST "${API_UC_PROJECT_DIR}/*")
+list(FILTER UC_API_LIST EXCLUDE REGEX ".md") # Remove .md files from UC_API_LIST
 
 foreach(API ${UC_API_LIST})
     add_subdirectory(${API} ${CMAKE_BINARY_DIR}/${API})