docs: fix typos

Found via `codespell -S test -L notin,nam,plantext,cryto,corelation,inout,ot`

docs/references/api/media_type_handlers.rst

@@ -15,7 +15,7 @@ Using these domains, :ref:`functions <functions>` can become handlers and `user-
 
 .. important::
 
-  - PostgREST vendor media types (``application/vnd.pgrst.plan``, ``application/vnd.pgrst.object`` and ``application/vnd.pgrst.array``) cannot be overriden.
+  - PostgREST vendor media types (``application/vnd.pgrst.plan``, ``application/vnd.pgrst.object`` and ``application/vnd.pgrst.array``) cannot be overridden.
   - Long media types like ``application/vnd.openxmlformats-officedocument.wordprocessingml.document`` cannot be expressed as domains since they surpass `PostgreSQL identifier length <https://www.postgresql.org/docs/current/limits.html#LIMITS-TABLE>`_.
     For these you can use the :ref:`any_handler`.
 

docs/references/api/resource_embedding.rst

@@ -1244,7 +1244,7 @@ You can order the correlated arrays explicitly. For example, to order by the fil
 
 .. warning::
 
-   Aliasing spreaded columns is recommended since JSON allows duplicate keys. Example:
+   Aliasing spread columns is recommended since JSON allows duplicate keys. Example:
 
    .. code-block:: bash
 

docs/references/api/tables_views.rst

@@ -639,7 +639,7 @@ However, it can work with surrogate primary keys (e.g. ``id serial primary key``
 
 .. code-block:: bash
 
-  curl "http://localhost:3000/employees?colums=id,name,salary" \
+  curl "http://localhost:3000/employees?columns=id,name,salary" \
     -X POST -H "Content-Type: application/json" \
     -H "Prefer: resolution=merge-duplicates, missing=default" \
     -d @- << EOF