update changelog and podfile for 4.6.4

CHANGELOG.md

@@ -9,7 +9,13 @@ Group changes to describe their impact on the project, as follows:
 	Removed for deprecated features removed in this release.
 	Fixed for any bug fixes.
 	Security to invite users to upgrade in case of vulnerabilities.
-		
+			
+## [4.6.4] - 2021-08-06
+### Changed
+- Update linphone SDK to 5.1.42
+
+### Fixed
+- Prevent possible application freeze and crash when creating a new chatroom, depending on the phone's contacts.
 	
 ## [4.6.3] - 2021-02-06
 

Podfile

@@ -5,7 +5,7 @@ source "https://github.com/CocoaPods/Specs.git"
 
 def all_pods
 	if ENV['PODFILE_PATH'].nil?
-		pod 'linphone-sdk', '~> 5.1.41'
+		pod 'linphone-sdk', '~> 5.1.42'
 	else
 		pod 'linphone-sdk', :path => ENV['PODFILE_PATH']  # local sdk
 	end