Update custom-node-list.json for sd-ppp (#527)

custom-node-list.json

@@ -7006,6 +7006,16 @@
             ],
             "install_type": "unzip",
             "description": "This is a node to convert an image into a CMYK Halftone dot image."
+        },
+        {
+            "author": "zombieyang",
+            "title": "SD-PPP",
+            "reference": "https://github.com/zombieyang/sd-ppp",
+            "files": [
+                "https://github.com/zombieyang/sd-ppp"
+            ],
+            "install_type": "git-clone",
+            "description": "!!Another custom node about Photoshop!! PPP means interoP with your PhotoshoP. You can get or send layers from/to your Photoshop. This custom node is easier to use."
         }
     ]
 }