Use notFalsy and notNullType in the docs examples

docs/feature-guide.md

@@ -201,7 +201,7 @@ Placeholder pipes allow you to customize how values are rendered in error messag
 ```php
 v::templated(
     'The {{field|raw}} field is required',
-    v::notEmpty(),
+    v::notFalsy(),
     ['field' => 'email'],
 )->assert('');
 // → The email field is required

docs/messages/placeholder-pipes.md

@@ -16,7 +16,7 @@ To use a placeholder pipe, modify your placeholder like this: `{{placeholder|mod
 ```php
 v::templated(
     'The {{field|raw}} field is required',
-    v::notEmpty(),
+    v::notFalsy(),
     ['field' => 'email'],
 )->assert('');
 // → The email field is required

docs/prefixes.md

@@ -96,15 +96,15 @@ v::minGreaterThan(0)->assert([0, 1, 2]);
 
 Any method starting with `not` will be transformed into `v::not(v::remainingPart())`.
 
-- `v::notEmpty()` → `v::not(v::empty())`
-- `v::notNull()` → `v::not(v::null())`
+- `v::notFalsy()` → `v::not(v::falsy())`
+- `v::notNullType()` → `v::not(v::nullType())`
 
 ```php
-v::notEmpty()->assert('hello')
+v::notFalsy()->assert('hello')
 // Validation passes successfully
 
-v::notEmpty()->assert('');
-// → The value must not be empty
+v::notFalsy()->assert('');
+// → "" must not be falsy
 ```
 
 ### `nullOr`