Update change log for 0.7.2.

Author: python-processing-unit

docs/CHANGELOG.html

@@ -86,6 +86,22 @@
 
 ---
 
+## 0.7.2
+
+### Major features
+
+N/A
+
+### Minor features
+
+N/A
+
+### Patches
+
+Rewrite the documentation.
+
+---
+
 ## 0.7.1
 
 ### Major features