spelling: canonicalize

Signed-off-by: Josh Soref <2119212+jsoref@users.noreply.github.com>

sep/sep-016.rst

@@ -148,7 +148,7 @@ Another example could be for building URL canonicalizers:
 ::
 
    #!python
-   class CanonializeUrl(LegSpider):
+   class CanonicalizeUrl(LegSpider):
 
        def process_request(self, request):
            curl = canonicalize_url(request.url, rules=self.spider.canonicalization_rules)

sep/sep-018.rst

@@ -321,7 +321,7 @@ Another example could be for building URL canonicalizers:
 ::
 
    #!python
-   class CanonializeUrl(object):
+   class CanonicalizeUrl(object):
 
        def process_request(self, request, response, spider):
            curl = canonicalize_url(request.url,