ci: update before purge in cleanup (#10938)

Signed-off-by: Lizan Zhou <lizan@tetrate.io>

.azure-pipelines/cleanup.sh

@@ -3,7 +3,7 @@
 set -e
 
 # Temporary script to remove tools from Azure pipelines agent to create more disk space room.
-
+sudo apt-get -y update
 sudo apt-get purge -y 'ghc-*' 'zulu-*-azure-jdk' 'libllvm*' 'mysql-*' 'dotnet-*' 'cpp-*'
 
 dpkg-query -Wf '${Installed-Size}\t${Package}\n' | sort -rn