Correct spelling mistakes (#1163)

Co-authored-by: collerek <collerek@gmail.com>

docs/fastapi/requests.md

@@ -37,7 +37,7 @@ class User(ormar.Model):
     category: str = ormar.String(max_length=255, default="User")
 ```
 
-In above example fields `id` (is an `autoincrement` `Integer`), `first_name` ( has `nullable=True`) and `category` (has `default`) are optional and can be skipped in response and model wil still validate.
+In above example fields `id` (is an `autoincrement` `Integer`), `first_name` ( has `nullable=True`) and `category` (has `default`) are optional and can be skipped in response and model will still validate.
 
 If the field is nullable you don't have to include it in payload during creation as well as in response, so given example above you can:
 
@@ -75,9 +75,9 @@ async def create_user3(user: RequestUser):  # use the generated model here
 !!!Warning
         The `get_pydantic` method generates all models in a tree of nested models according to an algorithm that allows to avoid loops in models (same algorithm that is used in `dict()`, `select_all()` etc.)
         
-        That means that nested models won't have reference to parent model (by default ormar relation is biderectional).
+        That means that nested models won't have reference to parent model (by default ormar relation is bidirectional).
         
-        Note also that if given model exists in a tree more than once it will be doubled in pydantic models (each occurance will have separate own model). That way you can exclude/include different fields on different leafs of the tree.
+        Note also that if given model exists in a tree more than once it will be doubled in pydantic models (each occurrence will have separate own model). That way you can exclude/include different fields on different leafs of the tree.
 
 #### Mypy and type checking
 
@@ -140,4 +140,4 @@ async def create_user3(user: UserCreate):  # use pydantic model here
     # note how now request param is a pydantic model and not the ormar one
     # so you need to parse/convert it to ormar before you can use database
     return await User(**user.dict()).save()
-```
+```