Restoring the example policies for blocking sha1 (#9677)

(In the transit api-docs)

website/pages/api-docs/secret/transit/index.mdx

@@ -891,9 +891,9 @@ supports signing.
   only for legacy applications. Signing using SHA-1 can be blocked by operators by
   assigning the following policy corresponding to a named key:
 
-  ```
-  {
-  ]
+  ```hcl
+  path "/transit/sign/:name/sha1" {
+    capabilities = ["deny"]
   }
   ```
 
@@ -1046,9 +1046,9 @@ data.
   be blocked by operators by assigning the following policy corresponding to a
   named key:
 
-  ```
-  {
-  ]
+  ```hcl
+  path "/transit/verify/:name/sha1" {
+    capabilities = ["deny"]
   }
   ```