Upgrade telegraf-agent to 1.38.4 (#1685)

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Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: 3 people

kubernetes/linux/setup.sh

@@ -63,7 +63,7 @@ sudo tdnf install jq-1.7.1-1.azl3 -y
 #used to setcaps for ruby process to read /proc/env
 sudo tdnf install libcap -y
 
-sudo tdnf install telegraf-agent-1.38.3 -y
+sudo tdnf install telegraf-agent-1.38.4 -y
 telegraf_version=$(sudo tdnf list installed | grep telegraf | awk '{print $2}')
 echo "telegraf $telegraf_version" >> packages_version.txt
 mv /usr/bin/telegraf-agent /opt/telegraf