Update CHANGELOG.md

Author: sn4k3

CHANGELOG.md

@@ -1,10 +1,13 @@
 # Changelog
 
+## /07/2025 - v5.1.5
+
 ## 28/06/2025 - v5.1.4
 
 - **PCB Exposure:**
   - (Change) Set no lift for gcode printers and 0.1mm for other printers (#1038)
   - (Fix) Implemented Deprecated Syntax Variations: Combining G01/G02/G03 and D01 in a single command (#1039)
+- (Add) Thread usage to title bar
 - (Fix) CXDLP: Don't allow 0mm as lift height (#1038)
 - (Upgrade) UVtoolsCmd parser and rebuild the commands
 - (Upgrade) AvaloniaUI from 11.3.1 to 11.3.2