Update Njalla hash

[xorbug]

[CRITICAL] [njalla-doh] Certificate hash [d61d96ebfb3fa19096e2c002e3603bf7fdaaefb22704da8668062bbe86ed4b93] not found

Thanks.

[jedisct1]

Automated verification by Swival (2026-04-06):

The certificate hash reported in this issue (d61d96eb...) is no longer present in the current stamp. It was already rotated to 9d4832bb... in a previous update, so the original cert hash issue is resolved.

However, testing the current njalla-doh stamp reveals a different problem:

• DNSSEC validation fails. The stamp advertises DNSSEC support (properties flag 0x07), but dnscrypt-proxy reports "DNSSEC support expected but not detected." The resolver works correctly when tested without the DNSSEC expectation.

The cert hash is up to date, but the DNSSEC flag may need to be removed from the stamp unless the server re-enables DNSSEC validation.

[jedisct1]

Fixed in a980a2b. The certificate hash was already up to date, but the stamp incorrectly advertised DNSSEC support. The DNSSEC flag has been removed from the njalla-doh stamp.