add finality & confidence levels docs

Author: khadni

src/content/cre/concepts/finality.mdx

@@ -45,7 +45,7 @@ CRE translates confidence levels to the appropriate blockchain mechanism:
 
 ### SAFE and LATEST
 
-For all supported chains, `SAFE` and `LATEST` use the chain's native `safe` and `latest` block tags respectively. These are standard JSON-RPC block parameters supported by all CRE-compatible chains.
+When you specify `SAFE` or `LATEST` in your workflows, CRE uses the chain's native `safe` and `latest` block tags respectively for all supported chains.
 
 ### FINALIZED