Replace gendered pronouns with gender neutral ones. (#16844)

src/basic/path-lookup.h

@@ -21,7 +21,7 @@ struct LookupPaths {
         char **search_path;
 
         /* Where we shall create or remove our installation symlinks, aka "configuration", and where the user/admin
-         * shall place his own unit files. */
+         * shall place their own unit files. */
         char *persistent_config;
         char *runtime_config;
 

src/basic/procfs-util.c

@@ -65,7 +65,7 @@ int procfs_tasks_set_limit(uint64_t limit) {
 
         if (limit == 0) /* This makes no sense, we are userspace and hence count as tasks too, and we want to live,
                          * hence the limit conceptually has to be above 0. Also, most likely if anyone asks for a zero
-                         * limit he/she probably means "no limit", hence let's better refuse this to avoid
+                         * limit they probably mean "no limit", hence let's better refuse this to avoid
                          * confusion. */
                 return -EINVAL;