updated changelog for 9.1.2 release; (#760)

* updated changelog for 9.1.2 release;

* fixed typo in version number;

Author: adityapinglesf

docs/CHANGELOG.md

@@ -1,6 +1,7 @@
 ## Changelog
 
 ## Navigation
+* [9.1.2](#912)
 * [9.1.1](#911)
 * [9.1.0.2](#9102)
 * [9.1.0.1](#9101)
@@ -78,6 +79,15 @@
 
 ---
 
+## 9.1.2
+
+#### Changes
+* Support for latest major Splunk release
+* Documentation updates
+* Bugfixes for Splunk-Ansible
+
+---
+
 ## 9.1.1
 
 #### Changes