b2sum: change more information link (#5563)

pages.it/common/b2sum.md

@@ -1,7 +1,7 @@
 # b2sum
 
 > Calcola checksum BLAKE2.
-> Maggiori informazioni: <https://blake2.net/#su>.
+> Maggiori informazioni: <https://www.gnu.org/software/coreutils/manual/html_node/b2sum-invocation.html>.
 
 - Calcola il checksum BLAKE2 per un file:
 

pages.ko/common/b2sum.md

@@ -1,7 +1,7 @@
 # b2sum
 
 > BLACK2 암호화 체크섬을 계산하십시오.
-> 더 많은 정보: <https://blake2.net/#su>.
+> 더 많은 정보: <https://www.gnu.org/software/coreutils/manual/html_node/b2sum-invocation.html>.
 
 - 파일의 BLACKE2 체크섬 계산:
 

pages/common/b2sum.md

@@ -1,7 +1,7 @@
 # b2sum
 
 > Calculate BLAKE2 cryptographic checksums.
-> More information: <https://blake2.net/#su>.
+> More information: <https://www.gnu.org/software/coreutils/manual/html_node/b2sum-invocation.html>.
 
 - Calculate the BLAKE2 checksum for a file: