chore: update readme for api keys (#792)

* api announcement

* updating copy

* version bump

Author: amanda103

CHANGELOG.md

@@ -1,4 +1,4 @@
-## 0.7.9-dev1
+## 0.7.9
 
 ### Enhancements
 

README.md

@@ -29,6 +29,16 @@
   </a>
 </div>
 
+<h3 align="center">
+  <p>API Announcement!</p>
+</h3>
+
+<p>While access to the hosted Unstructured API will remain free, API Keys will soon be required to make requests. To prevent any disruption, get yours <a href="https://www.unstructured.io/api-key/">here</a> now and start using it today!</p>
+  
+<p>Checkout the <a href="https://github.com/Unstructured-IO/unstructured-api#--">readme</a> here to get started making API calls. 
+We'd love to hear your feedback, let us know how it goes in our
+  community slack. And stay tuned for improvements to both quality and performance!</p>
+
 <h3 align="center">
   <p>Open-Source Pre-Processing Tools for Unstructured Data</p>
 </h3>

unstructured/__version__.py

@@ -1 +1 @@
-__version__ = "0.7.9-dev1"  # pragma: no cover
+__version__ = "0.7.9"  # pragma: no cover