Add a missing link for icu-i18n.

```
/usr/x86_64-pc-linux-gnu/binutils-bin/2.46.0/ld: src/MEGASync/mega/libSDKlib.a(utils.cpp.o): undefined reference to symbol '_ZN3icu8Collator14createInstanceERKNS_6LocaleER10UErrorCode'
/usr/x86_64-pc-linux-gnu/binutils-bin/2.46.0/ld: /usr/lib64/libicui18n.so.78: error adding symbols: DSO missing from command line
```

Fixes: https://github.com/meganz/sdk/commit/1f5c9cf8bd98a165aa65a9b05a6db118e35353e9
Patch: https://github.com/meganz/sdk/pull/2768
--- a/src/MEGASync/mega/cmake/modules/sdklib_libraries.cmake
+++ b/src/MEGASync/mega/cmake/modules/sdklib_libraries.cmake
@@ -110,8 +110,8 @@ macro(load_sdklib_libraries)
         pkg_check_modules(curl REQUIRED IMPORTED_TARGET libcurl)
         target_link_libraries(SDKlib PRIVATE PkgConfig::curl)
 
-        find_package(ICU COMPONENTS uc data REQUIRED)
-        target_link_libraries(SDKlib PRIVATE ICU::uc ICU::data)
+        find_package(ICU COMPONENTS i18n uc data REQUIRED)
+        target_link_libraries(SDKlib PRIVATE ICU::i18n ICU::uc ICU::data)
 
         if(USE_OPENSSL)
             find_package(OpenSSL REQUIRED)