sleep: add more information link (#5626)

pages.fa/common/sleep.md

@@ -1,6 +1,7 @@
 # sleep
 
 > ایجاد تاخیر بر اساس زمان.
+>  اطلاعات بیشتر: <https://www.gnu.org/software/coreutils/manual/html_node/sleep-invocation.html>.
 
 - تاخیر به ثانیه:
 

pages.sv/common/sleep.md

@@ -1,6 +1,7 @@
 # sleep
 
 > Fördröjning under bestämd tid.
+> Mer information: <https://www.gnu.org/software/coreutils/manual/html_node/sleep-invocation.html>.
 
 - Fördröj i sekunder:
 

pages/common/sleep.md

@@ -1,6 +1,7 @@
 # sleep
 
 > Delay for a specified amount of time.
+> More information: <https://www.gnu.org/software/coreutils/manual/html_node/sleep-invocation.html>.
 
 - Delay in seconds: