Update to offset link

[PokenDev21]

In the offset.cs this link

await FetchJson("https://raw.githubusercontent.com/a2x/cs2-dumper/main/output/client.dll.json"));

should be updated to this: https://raw.githubusercontent.com/a2x/cs2-dumper/main/output/client_dll.json

the diffrence being the seperator for client_dll being a _ instead of a .