Add f0rmiga as codeowner of build_file_example (#918)

.github/CODEOWNERS

diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
index 54374b3..3449bcf 100644
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -4,6 +4,7 @@
 
 # Directory containing the Gazelle extension and Go code.
 /gazelle/ @f0rmiga
+/examples/build_file_generation/ @f0rmiga
 
 # Toolchains
 /python/repositories.bzl @f0rmiga