Revert label change to the issue templates.

Author: fosdickio

.github/ISSUE_TEMPLATE/documentation.md

@@ -2,7 +2,7 @@
 name: Request for documentation
 about: Let us know where we can clarify Binary Ninja's documentation
 title: ''
-labels: ''
+labels: documentation
 assignees: ''
 
 ---

.github/ISSUE_TEMPLATE/feature_request.md

@@ -2,7 +2,7 @@
 name: Request a feature
 about: Let us know how we could improve Binary Ninja
 title: ''
-labels: ''
+labels: enhancement
 assignees: ''
 
 ---