refactor: remove colon from Deprecated auto models prefix

Change 'Deprecated: ' to 'Deprecated ' in auto model names for
cleaner display. Updates both the source logic in kilo-auto-model.ts
and the corresponding approval test snapshot.

Author: kilo-code-bot[bot]

src/lib/kilo-auto-model.ts

@@ -181,7 +181,7 @@ export function deprecatedAutoModelsToPreventNewExtensionModelPickerFromGettingS
       return {
         ...model,
         id: legacyId,
-        name: 'Deprecated: ' + model.name,
+        name: 'Deprecated ' + model.name,
         description: `${legacyId} is deprecated, use ${model.id} instead`,
       };
     })

src/tests/openrouter-models-sorting.approved.json

@@ -765,7 +765,7 @@
     },
     {
       "id": "kilo/auto",
-      "name": "Deprecated: Kilo Auto Frontier",
+      "name": "Deprecated Kilo Auto Frontier",
       "created": 0,
       "description": "kilo/auto is deprecated, use kilo-auto/frontier instead",
       "architecture": {
@@ -806,7 +806,7 @@
     },
     {
       "id": "kilo/auto-free",
-      "name": "Deprecated: Kilo Auto Free",
+      "name": "Deprecated Kilo Auto Free",
       "created": 0,
       "description": "kilo/auto-free is deprecated, use kilo-auto/free instead",
       "architecture": {
@@ -851,7 +851,7 @@
     },
     {
       "id": "kilo/auto-small",
-      "name": "Deprecated: Kilo Auto Small",
+      "name": "Deprecated Kilo Auto Small",
       "created": 0,
       "description": "kilo/auto-small is deprecated, use kilo-auto/small instead",
       "architecture": {