Fix the following -Werror warning from clang 10.0.0 in procstat:

usr.bin/procstat/procstat_sigs.c:79:3: error: misleading indentation; statement is not part of the previous 'else' [-Werror,-Wmisleading-indentation]
                xo_close_container(name);
                ^
usr.bin/procstat/procstat_sigs.c:77:4: note: previous statement is here
        } else
          ^

The intent was to group the xo_close_container() call to the previous
snprintf() call.

MFC after:	3 days

usr.bin/procstat/procstat_sigs.c

@@ -74,9 +74,10 @@ procstat_close_signame(int sig)
 		for (i = 0; name[i] != 0; i++)
 			name[i] = toupper(name[i]);
 		xo_close_container(name);
-	} else
+	} else {
 		snprintf(name, 12, "%d", sig);
 		xo_close_container(name);
+	}
 }
 
 static void