Set initial version to 1.0

Author: aidanheerdegen

metadata.yaml

@@ -24,5 +24,5 @@ nominal_resolution: 100 km
 reference: https://doi.org/10.1071/ES19035
 license: CC-BY-4.0
 model: ACCESS-ESM1.5
-version: ''
+version: '1.0'
 url: https://github.com/ACCESS-NRI/access-esm1.5-configs.git