MS-257 update bzip2 download url

Former-commit-id: 0c307a4ea79b28ecafac2c9ce91a2525f12bfcca

cpp/CHANGELOG.md

@@ -20,6 +20,7 @@ Please mark all change in change log and use the ticket from JIRA.
 - MS-234 - Some case cause background merge thread stop
 - MS-235 - Some test cases random fail
 - MS-236 - Add MySQLMetaImpl::HasNonIndexFiles
+- MS-257 - Update bzip2 download url
 
 ## Improvement
 - MS-156 - Add unittest for merge result functions

cpp/cmake/ThirdPartyPackages.cmake

@@ -219,7 +219,7 @@ endif()
 if(DEFINED ENV{MILVUS_BZIP2_URL})
     set(BZIP2_SOURCE_URL "$ENV{MILVUS_BZIP2_URL}")
 else()
-    set(BZIP2_SOURCE_URL "https://fossies.org/linux/misc/bzip2-${BZIP2_VERSION}.tar.gz")
+    set(BZIP2_SOURCE_URL "https://sourceware.org/pub/bzip2/bzip2-${BZIP2_VERSION}.tar.gz")
 endif()
 
 if(DEFINED ENV{MILVUS_EASYLOGGINGPP_URL})