Markdownlint cleanup

Signed-off-by: Martin Alfke <ma@betadots.de>

Author: tuxmea

docs/_openvox_8x/configuration.md

@@ -5,7 +5,7 @@ toc: columns
 canonical: "/openvox/latest/configuration.html"
 ---
 
-# Configuration Reference
+## Configuration Reference
 
 If you see this content, then the autogenerated content is missing.
 

docs/_openvox_8x/function.md

@@ -6,7 +6,7 @@ toc_levels: 2
 toc: columns
 ---
 
-# Built-in function reference
+## Built-in function reference
 
 If you see this content, then the autogenerated content is missing.
 

docs/_openvox_8x/types_strings/notify.md

@@ -6,7 +6,6 @@ canonical: "/openvox/latest/types/notify.html"
 
 ## Resource Type: notify
 
-
 If you see this content, then the autogenerated content is missing.
 
 Please check if an issue is open at [OpenVox Documentation](https://github.com/OpenVoxProject/openvox-docs/issues).