fix: docs: 140-shared-extensions.mdx: add missing space

Author: jlecordier

content/200-orm/200-prisma-client/300-client-extensions/140-shared-extensions.mdx

@@ -35,7 +35,7 @@ const xprisma = prisma.$extends(findOrCreate)
 const user = await xprisma.user.findOrCreate()
 ```
 
-When you call a method in an extension, use the constant name from your `$extends` statement, not `prisma`. In the above example,`xprisma.user.findOrCreate` works, but `prisma.user.findOrCreate` does not, because the original `prisma` is not modified.
+When you call a method in an extension, use the constant name from your `$extends` statement, not `prisma`. In the above example, `xprisma.user.findOrCreate` works, but `prisma.user.findOrCreate` does not, because the original `prisma` is not modified.
 
 ## Create a shareable extension