Clarify Abseil update in comment

Signed-off-by: Martijn Stevenson <[email protected]>

Author: martijneken

bazel/repositories.bzl

@@ -96,6 +96,8 @@ def proxy_wasm_cpp_host_repositories():
     # Core deps. Try to keep up with Envoy versions:
     # https://github.com/envoyproxy/envoy/blob/main/bazel/repository_locations.bzl
 
+    # Note: latest LTS release, ahead of Envoy to pick up a bugfix found in local fuzzing:
+    # https://github.com/abseil/abseil-cpp/commit/e7858c73279d81cbc005d9c76a385ab535520635
     maybe(
         http_archive,
         name = "com_google_absl",