fix swagger model validation

Author: yuwzho

specification/appplatform/resource-manager/Microsoft.AppPlatform/stable/2023-12-01/appplatform.json

@@ -14597,7 +14597,7 @@
       "description": "The name of the application accelerator.",
       "required": true,
       "type": "string",
-      "pattern": "^[a-z][a-z0-9]*$",
+      "pattern": "^[a-z][a-z0-9-]*[a-z0-9]$",
       "x-ms-parameter-location": "method"
     },
     "CustomizedAcceleratorNameParameter": {
@@ -14606,7 +14606,7 @@
       "description": "The name of the customized accelerator.",
       "required": true,
       "type": "string",
-      "pattern": "^[a-z][a-z0-9]*$",
+      "pattern": "^[a-z][a-z0-9-]*[a-z0-9]$",
       "x-ms-parameter-location": "method"
     },
     "PredefinedAcceleratorNameParameter": {
@@ -14615,7 +14615,7 @@
       "description": "The name of the predefined accelerator.",
       "required": true,
       "type": "string",
-      "pattern": "^[a-z][a-z0-9]*$",
+      "pattern": "^[a-z][a-z0-9-]*[a-z0-9]$",
       "x-ms-parameter-location": "method"
     }
   },