Bump version to 0.7.3.dev0 (#343)

Author: sfc-gh-mwyatt

pyproject.toml

@@ -21,7 +21,7 @@ Issues = "https://github.com/snowflakedb/ArcticTraining/issues"
 
 [project]
 name = "arctic_training"
-version = "0.7.2"
+version = "0.7.3.dev0"
 description = "Snowflake LLM training library"
 authors = [
     {author = "Michael Wyatt", email = "michael.wyatt@snowflake.com"},