docs: add links to the CHANGELOG from the README.md for Java and Node (#416)

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Source-Link: googleapis/synthtool@5936421

Author: yoshi-automation

packages/google-cloud-dns/README.md

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

packages/google-cloud-dns/synth.metadata

@@ -4,14 +4,14 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/nodejs-dns.git",
-        "sha": "774400e1be7e9941f0770308db3ead1ebfd0e332"
+        "sha": "329295fc8bedef5fff1b13112d311405a90189c1"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "89d431fb2975fc4e0ed24995a6e6dfc8ff4c24fa"
+        "sha": "5936421202fb53ed4641bcb824017dd393a3dbcc"
       }
     }
   ]