docs: 📚️ fix doc error (#1721)

sites/x6-sites/docs/api/graph/selecting.en.md

@@ -146,7 +146,7 @@ const graph = new Graph({
   selecting: {
     enabled: true,
     filter(node) {
-      return node.type === 'rect'
+      return node.shape === 'rect'
     },
   },
 })

sites/x6-sites/docs/api/graph/selecting.zh.md

@@ -146,7 +146,7 @@ const graph = new Graph({
   selecting: {
     enabled: true,
     filter(node) {
-      return node.type === 'rect'
+      return node.shape === 'rect'
     },
   },
 })

sites/x6-sites/docs/api/graph/snapline.en.md

@@ -114,7 +114,7 @@ const graph = new Graph({
   snapline: {
     enabled: true,
     filter(node) {
-      return node.type === 'rect'
+      return node.shape === 'rect'
     },
   },
 })

sites/x6-sites/docs/api/graph/snapline.zh.md

@@ -114,7 +114,7 @@ const graph = new Graph({
   snapline: {
     enabled: true,
     filter(node) {
-      return node.type === 'rect'
+      return node.shape === 'rect'
     },
   },
 })

sites/x6-sites/docs/tutorial/basic/selection.en.md

@@ -167,7 +167,7 @@ const graph = new Graph({
   selecting: {
     enabled: true,
     filter(node) {
-      return node.type === 'rect'
+      return node.shape === 'rect'
     },
   },
 })

sites/x6-sites/docs/tutorial/basic/selection.zh.md

@@ -167,7 +167,7 @@ const graph = new Graph({
   selecting: {
     enabled: true,
     filter(node) {
-      return node.type === 'rect'
+      return node.shape === 'rect'
     },
   },
 })

sites/x6-sites/docs/tutorial/basic/snapline.en.md

@@ -118,7 +118,7 @@ const graph = new Graph({
   snapline: {
     enabled: true,
     filter(node) {
-      return node.type === 'rect'
+      return node.shape === 'rect'
     },
   },
 })

sites/x6-sites/docs/tutorial/basic/snapline.zh.md

@@ -118,7 +118,7 @@ const graph = new Graph({
   snapline: {
     enabled: true,
     filter(node) {
-      return node.type === 'rect'
+      return node.shape === 'rect'
     },
   },
 })