Update seeds

Summary: See title.

Test Plan:
Used the script from D3809 on my local machine.

Mainnet:

T=$(cat nodes_main.txt | wc -l); N=$(./test-seeds.sh < nodes_main.txt | wc -l); echo "scale=3; $N / $T" | bc

% of connectable seeds before patch -> after patch:
84.7% -> 90.5%

Testnet:

T=$(cat nodes_main.txt | wc -l); N=$(./test-seeds.sh < nodes_main.txt | wc -l); echo "scale=3; $N / $T" | bc

% of connectable seeds before patch -> after patch:
82.8% -> 84.2%

Reviewers: #bitcoin_abc, deadalnix, Fabien

Reviewed By: #bitcoin_abc, Fabien

Differential Revision: https://reviews.bitcoinabc.org/D3829