first error: SELF_REFERENCE_FROM_TRIGGER

/* error message: first error: SELF_REFERENCE_FROM_TRIGGER

complete error:
Error:Apex trigger AccountTrigger caused an unexpected exception, contact your administrator: AccountTrigger: execution of BeforeUpdate 
caused by: System.DmlException: Update failed. First exception on row 0 with id 0015g000007naNoAAI; 
first error: SELF_REFERENCE_FROM_TRIGGER, Object (id = 0015g000007naNo) is currently in trigger AccountTrigger, 
therefore it cannot recursively update itself: []: Trigger.AccountTrigger: line 20, column 1
*/

Requirment: when account is updated, put latest opportunity's type

=========================code throwing error==============================

trigger AccountTrigger on Account (before update) {
    list<Account> UpdatelstAcc= new list<Account>();
    list<Account> lstAcc= new list<Account>();
    for(Account acc:trigger.new){
        if(acc!=trigger.oldmap.get(acc.Id)){
           lstAcc.add(acc); 
        }
    }
    if(lstAcc.size()>0){
        for(Opportunity opp:[select Id, Account.Id, Account.Description, Type from Opportunity 
                             where Account.Id=:lstAcc ORDER BY CreatedDate Limit 1]){
                                 system.debug('@@@@ opp: '+opp.Account.Description);
                                 opp.Account.Description=opp.Type;
                                 system.debug('@@@@ updated account: '+opp.Account.Description);
                                 UpdatelstAcc.add(opp.Account);
                                
                             }
    }
    if(UpdatelstAcc.size()>0){
    update UpdatelstAcc;
    }
    integer DMLCount= Limits.getDmlRows();
    integer DMLRows=Limits.getDmlStatements();
    integer SOQLCount=Limits.getQueries();
    system.debug('@@@@: '+DMLCount +''+DMLRows +''+SOQLCount);
}

=============Solution explained: https://help.salesforce.com/s/articleView?id=000324391&type=1 ===============================
========>>>>>Solution in below code:<<<<<==============================


trigger updateAccount on Account(before update){

set<string> setAcc = new set<string>();
    map<string,Opportunity> mapUp= new map<string,Opportunity>();
for(Account ac:trigger.new){

if(ac!=trigger.oldmap.get(ac.Id)){
	
	setAcc.add(ac.Id);
	
	
	
}
if(setAcc.size()>0){
	
	
	for(Opportunity opp:[select Id, Type, Account.Id, Account.Description,CreatedDate from Opportunity Where 
	                     Account.Id=:setAcc Order By CreatedDate DESC Limit 1]){
			system.debug('@@@ opp.Account.Description: '+opp.Account.Description);
                             system.debug('@@@ opp.Type: '+opp.Type);
			mapUp.put(opp.AccountId,opp);
						 }
    for(Account acc:trigger.new){
        acc.Description=mapUp.get(acc.Id).Type;
    }
}


}}