Bump mojo-regex 0.10.0 rev to include hash-keyed cache fix

Includes PR modular#99 (StringSlice pattern in public API with hash-keyed
cache) and the CHANGELOG entry for PRs modular#98 and modular#99 in the 0.10.0
section. New pin: 6a8a0bd (main HEAD).

Author: msaelices

recipes/mojo-regex/recipe.yaml

@@ -30,4 +30,4 @@ requirements:
     - ${{ pin_compatible('mojo-compiler') }}
 source:
   - git: https://github.com/msaelices/mojo-regex.git
-    rev: cbfdabc07804eccce24b19277b482072c6b969a1
+    rev: 6a8a0bd0e793527c5fc5acab881825b95a5da36b