Update changelog for 1.7.0 release

Author: castastrophe

CHANGELOG-1.x.md

@@ -1,6 +1,6 @@
-# 1.7.0 (2021)
+# 1.7.0 (2021-05-10)
 
-- [](https://github.com/patternfly/patternfly-elements/commit/) feat: Accordion direct link / expand on load (#859)
+- [351e33d](https://github.com/patternfly/patternfly-elements/commit/351e33dfd8f34963954275004e464ff4c561c01e) feat: Accordion direct link / expand on load (#859)
 - [b57c5b0](https://github.com/patternfly/patternfly-elements/commit/b57c5b013acef370ba962b7796a870c37802a33f) feat: Adds Web Test Runner which will eventually replace Web Component Tester
 - [20cb906](https://github.com/patternfly/patternfly-elements/commit/20cb906b5bf3d9340097170d6be7bdacbb4b12a5) fix: Updating PFElement.log (aka this.log) so it logs arrays and objects, instead of converting them to strings