How to Append Content Document title in Salesforce

Question

So I'm having an issue where MS teams invites are being sent to CASE queues for group meetings. This results in with a file being created which gets downloaded sometimes and sent to others.

• The file that gets create in salesforce by MS Teams has no ics list in the file Extension field and doesn't add .ics to the end of the tile.
• I can manually change the file Title field and add .ics to the end which allows the downloaded file to work properly.

I decide to take a stab at creating a trigger that would do this for me but haven't had luck.

What is incorrect about the below code? I don't get any errors when testing. however the name never changes. any help would be appreciated.

  trigger ContentVersionTrigger on ContentVersion (before insert) { 
    if(Trigger.isInsert && Trigger.IsBefore){ 
        for(ContentVersion cv: Trigger.new){ 
            Integer versionCount = 0; 
            versionCount = [SELECT count() FROM ContentVersion WHERE ContentDocumentId = :cv.Id]; 
            System.debug(versionCount); 
            if(versionCount <= 0){
                List<ContentDocument> contentDocList = [SELECT FileExtension FROM ContentDocument WHERE Id = :cv.ContentDocumentId];
                if(!contentDocList.isEmpty()){ 
                    String ext = contentDocList[0].FileExtension; 
                    if((ext == null) || (ext == '')){ 
                        cv.Title = cv.Title + '.ics'; 
                    } 
                    else if ( ext == 'ics'){
                        cv.Title = cv.Title + '.ics'; 
                    }
                }
            }
        }
    }
  }