samples/bpf: Fix spelling typos in samples/bpf

samples/bpf: Fix spelling typos in samples/bpf

do_hbm_test.sh:
The comment incorrectly used "upcomming" instead of "upcoming".

hbm.c
The comment incorrectly used "Managment" instead of "Management".
The comment incorrectly used "Currrently" instead of "Currently".

tcp_cong_kern.c
The comment incorrectly used "deteremined" instead of "determined".

tracex1.bpf.c
The comment incorrectly used "loobpack" instead of "loopback".

Signed-off-by: Chu Guangqing <chuguangqing@inspur.com>
Link: https://lore.kernel.org/r/20251015015024.2212-2-chuguangqing@inspur.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>