docs: add links to the CHANGELOG from the README.md for Java and Node (…

…#52)

This PR was generated using Autosynth. 🌈

Synth log will be available here:
https://source.cloud.google.com/results/invocations/7b446397-88f3-4463-9e7d-d2ce7069989d/targets

- [ ] To automatically regenerate this PR, check this box.

Source-Link: googleapis/synthtool@5936421

packages/google-cloud-memcache/README.md

@@ -14,6 +14,9 @@
 Memcache client for Node.js
 
 
+A comprehensive list of changes in each version may be found in
+[the CHANGELOG](https://github.com/googleapis/nodejs-memcache/blob/master/CHANGELOG.md).
+
 * [Memorystore for Memcached Node.js Client API Reference][client-docs]
 * [Memorystore for Memcached Documentation][product-docs]
 * [github.com/googleapis/nodejs-memcache](https://github.com/googleapis/nodejs-memcache)

packages/google-cloud-memcache/synth.metadata

@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/nodejs-memcache.git",
-        "sha": "76ee3d12e8531f433ac8f8f83c8aca91372646a8"
+        "sha": "d7cbe93174bf955d0d7752330b83d5ea5d4e2421"
       }
     },
     {
@@ -19,7 +19,7 @@
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "89d431fb2975fc4e0ed24995a6e6dfc8ff4c24fa"
+        "sha": "5936421202fb53ed4641bcb824017dd393a3dbcc"
       }
     }
   ],