chore: fix the script to sync package info (#428)

Author: sindharta

Scripts~/sync_package_info.sh

@@ -7,7 +7,7 @@ allProjects=(
 packageName="com.unity.streaming-image-sequence"
 
 for project in ${allProjects[@]}; do
-    cp package.json "${project}\\Packages\\${packageName}"
-    cp CHANGELOG.md "${project}\\Packages\\${packageName}"    
+    cp package.json "${project}/Packages/${packageName}"
+    cp CHANGELOG.md "${project}/Packages/${packageName}"    
 done