[3.18] community/w3m: security upgrade to 0.5.3.20230718
This is my first backport, so please let me know if i'm doing things correctly.
We are currently working on getting Alpine Linux 3.21 out. This means that merge requests that are not aimed to help with that (only affecting testing, new aports) have a lower priority at the moment. Please be patient, they will be eventually picked up.
This is my first backport, so please let me know if i'm doing things correctly.