Add mirror for embedded JDKs URLs

Reduce flakiness like: https://buildkite.com/bazel/bazel-bazel/builds/26343#018d1e09-4c23-404c-a307-7476e092c7ab

PiperOrigin-RevId: 599759327
Change-Id: I43fa2ec996f03e77da926c2afeaca13cbf029a1b
diff --git a/bazel_downloader.cfg b/bazel_downloader.cfg
index f61a530..99a15d3 100644
--- a/bazel_downloader.cfg
+++ b/bazel_downloader.cfg
@@ -2,3 +2,5 @@
 rewrite (github.com)/(.*) https://$1/$2
 rewrite (maven.google.com)/(.*) https://mirror.bazel.build/$1/$2
 rewrite (maven.google.com)/(.*) https://$1/$2
+rewrite (cdn.azul.com)/(.*) https://mirror.bazel.build/$1/$2
+rewrite (cdn.azul.com)/(.*) https://$1/$2