chore(deps): update dependency buildifier_prebuilt to v7 (#149)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

WORKSPACE

@@ -95,10 +95,10 @@ gazelle_dependencies()
 
 http_archive(
     name = "buildifier_prebuilt",
-    sha256 = "8ada9d88e51ebf5a1fdff37d75ed41d51f5e677cdbeafb0a22dda54747d6e07e",
-    strip_prefix = "buildifier-prebuilt-6.4.0",
+    sha256 = "481f220bee90024f4e63d3e516a5e708df9cd736170543ceab334064fa773f41",
+    strip_prefix = "buildifier-prebuilt-7.1.2",
     urls = [
-        "http://github.com/keith/buildifier-prebuilt/archive/6.4.0.tar.gz",
+        "http://github.com/keith/buildifier-prebuilt/archive/7.1.2.tar.gz",
     ],
 )