Update lib/mix/test/fixtures/gleam_dep/.gitignore

Co-authored-by: Eksperimental <[email protected]>

Author: Papipo

lib/mix/test/fixtures/gleam_dep/.gitignore

@@ -1,4 +1,11 @@
+# The directory Mix will write compiled artifacts to.
+/_build/
+
+# If the VM crashes, it generates a dump, let's ignore it too.
+erl_crash.dump
+
+# BEAM bytecode files.
 *.beam
+
+# Also ignore archive artifacts (built via "mix archive.build").
 *.ez
-/build
-erl_crash.dump