blog: fix ixgbe-queue-index.markdown

Signed-off-by: Junwei Zhang <linggao.zjw@alibaba-inc.com>
blog: netdevice-watchdog-cause-tx-queue-schedule

Signed-off-by: Junwei Zhang <linggao.zjw@alibaba-inc.com>
blog: fix categories

Signed-off-by: Junwei Zhang <linggao.zjw@alibaba-inc.com>