docs[canvasrenderingcontext2d]: fix typo in filter url description (#35467)

* docs[canvasrenderingcontext2d]: fix typo in filter url description

Fixed typo of "IRI" to "URL" updated list of whats valid (i.e. Ids, external xml path, data encoded SVG)

* Update files/en-us/web/api/canvasrenderingcontext2d/filter/index.md

* Update files/en-us/web/api/canvasrenderingcontext2d/filter/index.md

---------

Co-authored-by: Joshua Chen <sidachen2003@gmail.com>

Author: digitalfu

files/en-us/web/api/canvasrenderingcontext2d/filter/index.md

@@ -19,8 +19,8 @@ The `filter` property accepts a value of `"none"` or one or more
 of the following filter functions in a string.
 
 - [`url()`](/en-US/docs/Web/CSS/url_function)
-  - : A CSS {{cssxref("url_function", "url()")}}. Takes an IRI pointing to an SVG filter element,
-    which may be embedded in an external XML file.
+  - : A CSS {{cssxref("url_function", "url()")}}. Takes any URL that resolves to SVG filter element.
+    This can be the ID of an element, a path to external XML file, or even a data encoded SVG value.
 - [`blur()`](/en-US/docs/Web/CSS/filter-function/blur)
   - : A CSS {{cssxref("<length>")}}. Applies a Gaussian blur to the drawing. It
     defines the value of the standard deviation to the Gaussian function, i.e., how many