Fix undefined array key warnings in openswoole/swoole card templates

[Copilot]

preg_match result arrays are accessed at index [1] without checking for a match, causing PHP warnings when a feature key (e.g. json, curl-native, postgres) is absent from php --ri output.

• Add null coalescing fallback (?? 'disabled') to all 13 preg_match result accesses across card-openswoole.phtml (7) and card-swoole.phtml (6)

# before
preg_match("/^json => (.+)/m", $openswoole, $json); echo $json[1];

# after
preg_match("/^json => (.+)/m", $openswoole, $json); echo $json[1] ?? 'disabled';

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[tillkruss]

@dhobi do you happen to know if they renamed these or why it's suddenly not mentioned anymore?

[tillkruss]

openswoole

OpenSwoole => enabled
Author => OpenSwoole Group <hello@openswoole.com>
Version => 26.2.0
Built => Mar  5 2026 13:51:40
coroutine => enabled with boost asm context
kqueue => enabled
rwlock => enabled
http2 => enabled
hook-curl => enabled
pcre => enabled
zlib => 1.2.12

Directive => Local Value => Master Value
openswoole.enable_coroutine => On => On
openswoole.enable_preemptive_scheduler => Off => Off
openswoole.use_fiber_context => Off => Off
openswoole.display_errors => On => On
openswoole.unixsock_buffer_size => 262144 => 262144