The hole in the seal is there for technical reasons, it is like a pressure valve. Without this hole, the seal would burst during filling due to the production process, as some pressure is created by the machine and has to escape.
Depending on the conditions, a hole may or may not be necessary. The hole has no influence on the hygiene and purity of the products, as the cans are filled under absolutely clean conditions anyway and the tightly screwed lid sufficiently seals the contents of the can.
You can consume the product without hesitation!