bind: fixed indentation for rebuild

wiki/bind.md

@@ -34,17 +34,17 @@ There are some special variables to set.
 
 #### Rebuild
 
-```
+```shell
 #!/bin/sh
 docker stop bind
 docker rm bind
 docker pull ventz/bind:latest
 docker run --name bind \
-	--restart unless-stopped \
-	--dns=1.1.1.1 --dns=8.8.8.8 \
-	-p 53:53/udp \
-	-p 53:53 \
-	-v bind_cache:/var/cache/bind  \
-	-v bind_etc:/etc/bind \
-	-d ventz/bind:latest
+    --restart unless-stopped \
+    --dns=1.1.1.1 --dns=8.8.8.8 \
+    -p 53:53/udp \
+    -p 53:53 \
+    -v bind_cache:/var/cache/bind  \
+    -v bind_etc:/etc/bind \
+    -d ventz/bind:latest
 ```