ti: family: k3: Change U-boot repository link

Change U-Boot repository link from git.ti.com to Github. In the past,
there have been CI issues caused due to git.ti.com failing.

Signed-off-by: Suhaas Joshi <[email protected]>

Author: jsuhaas22

config/sources/families/k3.conf

@@ -13,7 +13,7 @@ declare -g OVERLAY_DIR="/boot/dtb/ti/overlay"
 
 declare -g KERNELSOURCE="https://github.com/TexasInstruments-Sandbox/ti-linux-kernel"
 declare -g ATFSOURCE="https://github.com/TexasInstruments/arm-trusted-firmware"
-declare -g BOOTSOURCE="https://git.ti.com/cgit/ti-u-boot/ti-u-boot"
+declare -g BOOTSOURCE="https://github.com/TexasInstruments-Sandbox/ti-u-boot"
 
 declare -g BOOTSCRIPT="boot-k3.cmd:uEnv.txt"
 declare -g SPD_OPTEED="SPD=opteed"