Fix sitemap by moving comment. (#12216)

Try to fix #12215

Author: ericholscher

readthedocs/proxito/views/serve.py

@@ -817,7 +817,7 @@ def priorities_generator():
             It generates values from 1 to 0.1 by decreasing in 0.1 on each
             iteration. After 0.1 is reached, it will keep returning 0.1.
             """
-            priorities = [1, 0.9, 0.8, 0.7, 0.6, 0.5, 0.4, 0.3, 0.2]
+            priorities = [1.0, 0.9, 0.8, 0.7, 0.6, 0.5, 0.4, 0.3, 0.2]
             yield from itertools.chain(priorities, itertools.repeat(0.1))
 
         def hreflang_formatter(lang):

readthedocs/templates/sitemap.xml

@@ -1,3 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
+        xmlns:xhtml="http://www.w3.org/1999/xhtml">
 <!--
 This sitemap is autogenerated by Read the Docs.
 It contains all public versions,
@@ -8,9 +11,6 @@ You can learn more about sitemaps, including how to customize them, in our docum
 * Our documentation on Sitemaps: https://docs.readthedocs.com/platform/stable/reference/sitemaps.html
 * Our guide about SEO techniques: https://docs.readthedocs.com/platform/stable/guides/technical-docs-seo-guide.html
 -->
-<?xml version="1.0" encoding="UTF-8"?>
-<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
-        xmlns:xhtml="http://www.w3.org/1999/xhtml">
   {% for version in versions %}
   <url>
     <loc>{{ version.loc }}</loc>