Update io_bazel_rules_avro digest to a8cfad4

Author: renovate[bot]

WORKSPACE

@@ -104,9 +104,9 @@ http_archive(
 http_archive(
     name = "io_bazel_rules_avro",
     patches = ["//third_party/rules_avro:rules_avro.patch"],
-    sha256 = "d92109e9333acd65e1f8071397802e3c14e43cd6193ff0f529c57083e4840a12",
-    strip_prefix = "rules_avro-c14ea879bb28083cb1dc555d2014da66a2c1ec06",
-    url = "https://github.com/chenrui333/rules_avro/archive/c14ea879bb28083cb1dc555d2014da66a2c1ec06.tar.gz",
+    sha256 = "3a92093d8d905672d190c491c97c409c41c9a6cc05e16d83997be60df9ff49d9",
+    strip_prefix = "rules_avro-a8cfad4ce7555ab99d6192f097a570c659f1c11e",
+    url = "https://github.com/chenrui333/rules_avro/archive/a8cfad4ce7555ab99d6192f097a570c659f1c11e.tar.gz",
 )
 
 # ---