[Release] Bump version to 1.0.0-alpha.1

Signed-off-by: David Feltell <david.feltell@foundry.com>

Author: feltech

RELEASE_NOTES.md

@@ -1,7 +1,7 @@
 Release Notes
 =============
 
-vX.X.X
+v1.0.0-alpha.1
 --------------
 
 ### New Features