bpftool: Fix typos

Fix typos in documentation.
Reported-by: Matthew Wilcox <willy@infradead.org>
Reported-by: Quentin Monnet <qmo@kernel.org>
Signed-off-by: Andrew Kreimer <algonell@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Quentin Monnet <qmo@kernel.org>
Link: https://lore.kernel.org/bpf/20240909092452.4293-1-algonell@gmail.com

tools/bpf/bpftool/Documentation/bpftool-gen.rst

@@ -172,7 +172,7 @@ bpftool gen min_core_btf *INPUT* *OUTPUT* *OBJECT* [*OBJECT*...]
     CO-RE based application, turning the application portable to different
     kernel versions.
 
-    Check examples bellow for more information how to use it.
+    Check examples below for more information on how to use it.
 
 bpftool gen help
     Print short help message.