doc: spelling error changes

Fixed multiple spelling errors.

Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Carlos E. Garcia <carlos@cgarcia.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/Documentation/security/Yama.txt b/Documentation/security/Yama.txt
index dd908cf..227a63f 100644
--- a/Documentation/security/Yama.txt
+++ b/Documentation/security/Yama.txt
@@ -37,7 +37,7 @@
 In mode 1, software that has defined application-specific relationships
 between a debugging process and its inferior (crash handlers, etc),
 prctl(PR_SET_PTRACER, pid, ...) can be used. An inferior can declare which
-other process (and its descendents) are allowed to call PTRACE_ATTACH
+other process (and its descendants) are allowed to call PTRACE_ATTACH
 against it. Only one such declared debugging process can exists for
 each inferior at a time. For example, this is used by KDE, Chromium, and
 Firefox's crash handlers, and by Wine for allowing only Wine processes