Update dependency com_github_bazelbuild_buildtools to v7

Author: renovate[bot]

WORKSPACE

@@ -63,9 +63,9 @@ http_archive(
 
 http_archive(
     name = "com_github_bazelbuild_buildtools",
-    sha256 = "05c3c3602d25aeda1e9dbc91d3b66e624c1f9fdadf273e5480b489e744ca7269",
-    strip_prefix = "buildtools-6.4.0",
-    url = "https://github.com/bazelbuild/buildtools/archive/refs/tags/v6.4.0.tar.gz",
+    sha256 = "061472b3e8b589fb42233f0b48798d00cf9dee203bd39502bd294e6b050bc6c2",
+    strip_prefix = "buildtools-7.1.0",
+    url = "https://github.com/bazelbuild/buildtools/archive/refs/tags/v7.1.0.tar.gz",
 )
 
 http_archive(