docs: add links to the CHANGELOG from the README.md for Java and Node (#519)

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Source-Link: googleapis/synthtool@5936421

Author: yoshi-automation

packages/google-privacy-dlp/README.md

@@ -16,6 +16,9 @@ powerful detection engine for personally identifiable information and other priv
 data in unstructured data streams.
 
 
+A comprehensive list of changes in each version may be found in
+[the CHANGELOG](https://github.com/googleapis/nodejs-dlp/blob/master/CHANGELOG.md).
+
 * [Cloud Data Loss Prevention Node.js Client API Reference][client-docs]
 * [Cloud Data Loss Prevention Documentation][product-docs]
 * [github.com/googleapis/nodejs-dlp](https://github.com/googleapis/nodejs-dlp)

packages/google-privacy-dlp/synth.metadata

@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/nodejs-dlp.git",
-        "sha": "646b7cdb8ae6f01e872e935dd9fcfff92c7b8dcb"
+        "sha": "2f662d5708402aa26da5c6ef7693daab06150a23"
       }
     },
     {
@@ -19,7 +19,7 @@
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "89d431fb2975fc4e0ed24995a6e6dfc8ff4c24fa"
+        "sha": "5936421202fb53ed4641bcb824017dd393a3dbcc"
       }
     }
   ],