ci: Abort on failure to query Github's API

This raises an exception if the GET request to Github's API returns anything other than 200 OK, ensuring we always have successful merges of tagged PRs.
Also, reduces the number of queried pages from 29 to 9 to reduce the number of requests.

.ci/scripts/merge/apply-patches-by-label.py

@@ -20,6 +20,7 @@ def check_individual(labels):
 def do_page(page):
     url = 'https://api.github.com/repos/yuzu-emu/yuzu/pulls?page=%s' % page
     response = requests.get(url)
+    response.raise_for_status()
     if (response.ok):
         j = json.loads(response.content)
         if j == []:
@@ -33,7 +34,7 @@ def do_page(page):
                 print(subprocess.check_output(["git", "commit", "-m\"Merge %s PR %s\"" % (tagline, pn)]))
 
 try:
-    for i in range(1,30):
+    for i in range(1,10):
         do_page(i)
 except:
     traceback.print_exc(file=sys.stdout)