Fix typo

Author: dougiesquire

.github/data/standard.json

@@ -4,7 +4,7 @@
   "oneapi_compiler": "oneapi@2025.2.0",
   "cice4_version": "git.access-esm1.5-2025.04.001=access-esm1.5",
   "cice5_version_om2": "git.2025.03.001=access-om2",
-  "cice5_version_esm1p6": "@git.access-esm1.6-2025.07.001=access-esm1.6",
+  "cice5_version_esm1p6": "git.access-esm1.6-2025.07.001=access-esm1.6",
   "um_version_esm1p6": "git.access-esm1.6-2025.06.000=access-esm1.6",
   "um_version_esm1p5": "git.2024.10.17=access-esm1.5",
   "gcom4_version": "git.2024.05.28=access-esm1.5",