fix: enable tcp_bbr to load automatically after reboot (#4011)

## Overview

Fix: Enable automatic loading of tcp_bbr module after reboot
(cherry picked from commit 2be49e2)

Makefile

@@ -264,6 +264,7 @@ enable-bbr:
 	@if [ "$(sysctl net.ipv4.tcp_congestion_control | awk '{print $3}')" != "bbr" ]; then \
 	    echo "BBR is not enabled. Configuring BBR..."; \
 	    sudo modprobe tcp_bbr; \
+            echo tcp_bbr | sudo tee -a /etc/modules; \
 	    echo "net.core.default_qdisc=fq" | sudo tee -a /etc/sysctl.conf; \
 	    echo "net.ipv4.tcp_congestion_control=bbr" | sudo tee -a /etc/sysctl.conf; \
 	    sudo sysctl -p; \