Update org.apache.httpcomponents:httpcore to 4.4.16

The Elasticsearch module depends on httpcore-nio:4.4.12, so this
update can potentially fix some issues likely caused by library
incompatibility.

Bug: Issue 317782004
Release-Notes: Update org.apache.httpcomponents:httpcore to 4.4.16
Change-Id: Id11d70d67a2026858f0e8ee644a9f7d3f600f250
(cherry picked from commit 9752e8fa170dd35dab8efb0b52dbad7599ee1666)
diff --git a/tools/deps.bzl b/tools/deps.bzl
index 100670c..9954c5f 100644
--- a/tools/deps.bzl
+++ b/tools/deps.bzl
@@ -457,8 +457,8 @@
 
     maven_jar(
         name = "httpcore",
-        artifact = "org.apache.httpcomponents:httpcore:4.4.4",
-        sha1 = "b31526a230871fbe285fbcbe2813f9c0839ae9b0",
+        artifact = "org.apache.httpcomponents:httpcore:4.4.16",
+        sha1 = "51cf043c87253c9f58b539c9f7e44c8894223850",
     )
 
     # Test-only dependencies below.