Fix capitalization of "twitter" in RecreateSKPs bot

Case has suddenly started to matter.

NoTry: true
Bug: skia:7917
Change-Id: I6020622bd12481a2ac291caf565632451a3c8da5
Reviewed-on: https://skia-review.googlesource.com/128480
Commit-Queue: Ravi Mistry <rmistry@google.com>
Reviewed-by: Eric Boren <borenet@google.com>
diff --git a/tools/skp/webpages_playback.py b/tools/skp/webpages_playback.py
index 4118160..c38b89b 100644
--- a/tools/skp/webpages_playback.py
+++ b/tools/skp/webpages_playback.py
@@ -106,7 +106,7 @@
 
 PAGE_SETS_TO_EXCLUSIONS = {
     # See skbug.com/7348
-    'key_mobile_sites_smooth.py': '"(digg|worldjournal|Twitter)"',
+    'key_mobile_sites_smooth.py': '"(digg|worldjournal|twitter)"',
     # See skbug.com/7421
     'top_25_smooth.py': '"(mail\.google\.com)"',
 }