chore(syncthing): fix patch tree structure

This reverts commit d6107f53e0.

apps/syncthing/overlays/media/deployment-patch.yaml

@@ -4,18 +4,22 @@ metadata:
   name: syncthing
 spec:
   template:
-    containers:
-      - name: syncthing
-        volumeMounts:
-          # - name: sync-keys
-          #   mountPath: /var/syncthing/config/cert.pem
-          #   subPath: cert.pem
-          #   readOnly: true
-          - name: sync-keys
-            mountPath: /var/syncthing/config/key.pem
-            readOnly: true
-            subPath: key.pem
-    volumes:
-      - name: sync-keys
-        secret:
-          secretName: sync-secret
+    spec:
+      containers:
+        - name: syncthing
+          volumeMounts:
+            - name: sync-keys
+              mountPath: /var/syncthing/config/cert.pem
+              subPath: cert.pem
+              readOnly: true
+            - name: sync-keys
+              mountPath: /var/syncthing/config/key.pem
+              readOnly: true
+              subPath: key.pem
+      volumes:
+        - name: sync-keys
+          secret:
+            secretName: sync-secret
+            items:
+              - key: cert.pem
+              - key: key.pem