update ticker and readme file

Author: CoderZhi

README.md

@@ -50,6 +50,9 @@ $ anvil
 ```shell
 $ TGE=$timestamp forge script script/NubilaNetwork.s.sol:NubilaNetworkScript --rpc-url <your_rpc_url> --private-key <your_private_key> 
 ```
+* `timestamp` is the moment when tokens are officially distributed to public.
+* The beneficiaries are set to be the owner of VestingManager contract, which could be updated later.
+* Eventually, the ownership of the VestingManager contract should be transferred to a MultiSig wallet for security purpose.
 
 ### Cast
 

src/NubilaNetwork.sol

@@ -4,8 +4,8 @@ pragma solidity ^0.8.20;
 import "openzeppelin-contracts/contracts/token/ERC20/ERC20.sol";
 
 contract NubilaNetwork is ERC20 {
-    constructor(address owner) ERC20("Nubila Network", "NUBI") {
-        require(owner != address(0), "owner address is zero");
-        _mint(owner, 1_000_000_000 ether);
+    constructor(address init) ERC20("Nubila Network", "NB") {
+        require(init != address(0), "init address is zero");
+        _mint(init, 1_000_000_000 ether);
     }
 }