Fix podspec

[cozzin]

The error occurred when executing pod turnk push

$ pod trunk push

[!] Found podspec `SendBirdSDK.podspec`
Updating spec repo `trunk`
Validating podspec
[!] Unable to interpret the specified path `SendBirdSDK.podspec` as a podspec (Pod::DSLError).

�The error occurred because there were elements that did not fit the podspec format.

$ pod spec lint --verbose

  CDN: trunk Relative path: CocoaPods-version.yml exists! Returning local because checking is only performed in repo update
 -> SendBirdSDK.podspec
    - ERROR | spec: The specification defined in `SendBirdSDK.podspec` could not be loaded.


[!] Invalid `SendBirdSDK.podspec` file: syntax error, unexpected string literal, expecting '}'
    'Damon Park' => 'damon.park@se...
    ^
sendbird-ios-framework/SendBirdSDK.podspec:14: syntax error, unexpected '}', expecting `end'
sendbird-ios-framework/SendBirdSDK.podspec:22: syntax error, unexpected `end', expecting end-of-input.

 #  from ~/Dev/sendbird-ios-framework/SendBirdSDK.podspec:13
 #  -------------------------------------------
 #      'Ernest Hong' => '[email protected]'
 >      'Damon Park' => '[email protected]'
 #    }
 #  -------------------------------------------


Analyzed 1 podspec.

[!] The spec did not pass validation, due to 1 error.

~/.gem/ruby/3.1.0/gems/cocoapods-1.12.1/lib/cocoapods/command/spec/lint.rb:107:in `run'
~/.rbenv/versions/3.1.0/lib/ruby/gems/3.1.0/gems/claide-1.1.0/lib/claide/command.rb:334:in `run'
~/.gem/ruby/3.1.0/gems/cocoapods-1.12.1/lib/cocoapods/command.rb:52:in `run'
~/.gem/ruby/3.1.0/gems/cocoapods-1.12.1/bin/pod:55:in `<top (required)>'
~/.gem/ruby/3.1.0/bin/pod:25:in `load'
~/.gem/ruby/3.1.0/bin/pod:25:in `<main>'