libbpf: Fix comment typo

mainline inclusion
from mainline-5.15-rc1
commit c139e40a
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I5EUVD
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c139e40a515d2d1e51f7c08bd63ed4d1c7f64163

-------------------------------------------------

Remove the repeated word 'the' in line 48.
Signed-off-by: NJason Wang <wangborong@cdjrlc.com>
Signed-off-by: NAndrii Nakryiko <andrii@kernel.org>
Acked-by: NYonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20210727115928.74600-1-wangborong@cdjrlc.com
(cherry picked from commit c139e40a)
Signed-off-by: NWang Yufen <wangyufen@huawei.com>

tools/lib/bpf/libbpf.c

@@ -8280,7 +8280,7 @@ static int find_btf_by_prefix_kind(const struct btf *btf, const char *prefix,
 	ret = snprintf(btf_type_name, sizeof(btf_type_name),
 		       "%s%s", prefix, name);
 	/* snprintf returns the number of characters written excluding the
-	 * the terminating null. So, if >= BTF_MAX_NAME_SIZE are written, it
+	 * terminating null. So, if >= BTF_MAX_NAME_SIZE are written, it
 	 * indicates truncation.
 	 */
 	if (ret < 0 || ret >= sizeof(btf_type_name))