Increase number of shards of address to 34

To avoid the timeout issue for the nightly tests, this MR further increases the number of shards for address sanitizer from 32 to 34.
diff --git a/.gitlab/ci_nightly.yml b/.gitlab/ci_nightly.yml
index 6a35258..ffd758a 100644
--- a/.gitlab/ci_nightly.yml
+++ b/.gitlab/ci_nightly.yml
@@ -237,7 +237,7 @@
 
 Linux Sanitizer (address) Test Nightly:
   extends: .sanitizer-common-nigtly
-  parallel: 32
+  parallel: 34
   variables:
     AOM_SANITIZER_TYPE: address
   needs: