style: fix indentation in opencode.jsonc

Signed-off-by: Jérôme Benoit <jerome.benoit@piment-noir.org>

Author: jerome-benoit

.opencode/opencode.jsonc

@@ -1,8 +1,8 @@
 {
-	"$schema": "https://opencode.ai/config.json",
-	"formatter": {
-		"biome": {
-			"disabled": true
-		}
-	}
+  "$schema": "https://opencode.ai/config.json",
+  "formatter": {
+    "biome": {
+      "disabled": true
+    }
+  }
 }