chore: default infisical env is now "test" (#1012)

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> [!IMPORTANT]
> Set `defaultEnvironment` to "test" in `.infisical.json`.
> 
>   - **Configuration**:
>     - Update `defaultEnvironment` in `.infisical.json` to "test".
> 
> <sup>This description was created by </sup>[<img alt="Ellipsis"
src="https://img.shields.io/badge/Ellipsis-blue?color=175173">](https://www.ellipsis.dev?ref=BoundaryML%2Fbaml&utm_source=github&utm_medium=referral)<sup>
for 564b84e. It will automatically
update as commits are pushed.</sup>

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Author: sxlijin

.infisical.json

@@ -1,5 +1,5 @@
 {
     "workspaceId": "63f942680b94e4248e89eb42",
-    "defaultEnvironment": "",
+    "defaultEnvironment": "test",
     "gitBranchToEnvironmentMapping": null
-}
+}