Update legal.yml

Author: josh-padnick

_data/legal.yml

@@ -161,3 +161,10 @@
   category: subprocessors
   link: https://github.com/gruntwork-io/gruntwork-io.github.io/commit/be2504da
   date: 2021-09-08
+
+- guid: 10020
+  title: Update Data Processing Agreement
+  description: We've updated our Data Processing Agreement to use a more standardized set of terms and the latest Standard Contractual Clauses.
+  category: data-processing-agreement
+  link: https://github.com/gruntwork-io/gruntwork-io.github.io/commit/2dc020dd
+  date: 2021-12-14