Update install.sh

Author: github-actions[bot]

scripts/nightly/install.sh

@@ -809,7 +809,7 @@ channel='nightly'
 verbose='1'
 cpu=''
 os=''
-version='1.8.1-nightly.1'
+version='1.8.1-nightly.2'
 uninstall='0'
 remove_command="rm -f"
 symlink_exists='0'