Add documentation for images using URL (#3409)

components/display/index.rst

@@ -678,6 +678,13 @@ Use this component to store graphical images on the device, you can then draw th
         id: alert
         resize: 80x80
 
+.. code-block:: yaml
+
+    image:
+      - file: https://esphome.io/_images/logo.png
+        id: esphome_logo
+        resize: 200x162
+
 Configuration variables:
 
 - **file** (**Required**, string):
@@ -685,6 +692,7 @@ Configuration variables:
   - **Local files**: The path (relative to where the .yaml file is) of the image file.
   - **Material Design Icons**: Specify the `Material Design Icon <https://pictogrammers.com/library/mdi/>`_
     id in the format ``mdi:icon-name``, and that icon will automatically be downloaded and added to the configuration.
+  - **Remote files**: The URL of the image file.
 
 - **id** (**Required**, :ref:`config-id`): The ID with which you will be able to reference the image later
   in your display code.

lint.py

@@ -395,6 +395,7 @@ def lint_directive_formatting(fname, content):
     include=["*.rst"],
     exclude=[
         "components/web_server.rst",
+        "components/display/index.rst",
     ],
 )
 def lint_esphome_io_link(fname, match):