Update openapi-extractor to latest

[nickvergessen]

☑️ Resolves

• Fix failing build:

$ make openapi-spec 
cd build && sh get-server-sources.sh 


Fetching source for master

remote: Enumerating objects: 11551, done.
remote: Counting objects: 100% (8964/8964), done.
remote: Compressing objects: 100% (3345/3345), done.
remote: Total 4544 (delta 2592), reused 1695 (delta 1103), pack-reused 0
Empfange Objekte: 100% (4544/4544), 12.92 MiB | 4.05 MiB/s, fertig.
Löse Unterschiede auf: 100% (2592/2592), abgeschlossen mit 1794 lokalen Objekten.
Von https://github.com/nextcloud/server
 + 5821f884e8...b3e24a6bf2 master     -> origin/master  (Aktualisierung erzwungen)
 + e867ca0c2e...b4d6db5a88 stable24   -> origin/stable24  (Aktualisierung erzwungen)
Bereits auf 'master'
Ihr Branch und 'origin/master' sind divergiert,
und haben jeweils 1 und 1 unterschiedliche Commits.
  (verwenden Sie "git pull", wenn Sie den Remote-Branch in Ihren integrieren wollen)
HEAD ist jetzt bei b3e24a6bf2 Merge pull request #41764 from nextcloud/nickvergessen-patch-1
git submodule update --init
cd build/openapi-extractor && composer install
Installing dependencies from lock file (including require-dev)
Verifying lock file contents can be installed on current platform.
Nothing to install, update or remove
Generating autoload files
1 package you are using is looking for funding.
Use the `composer fund` command to find out more!
cd build && ./openapi-extractor/merge-specs \
	--core server/core/openapi.json \
	--merged ../developer_manual/_static/openapi.json \
	$(ls server/apps/*/openapi.json)
PHP Warning:  Undefined array key "properties" in /home/nickv/Nextcloud/Repositories/documentation/build/openapi-extractor/merge-specs on line 106
PHP Fatal error:  Uncaught TypeError: array_merge_recursive(): Argument #2 must be of type array, null given in /home/nickv/Nextcloud/Repositories/documentation/build/openapi-extractor/merge-specs:106
Stack trace:
#0 /home/nickv/Nextcloud/Repositories/documentation/build/openapi-extractor/merge-specs(106): array_merge_recursive()
#1 /home/nickv/Nextcloud/Repositories/documentation/build/openapi-extractor/merge-specs(67): collectCapabilities()
#2 {main}
  thrown in /home/nickv/Nextcloud/Repositories/documentation/build/openapi-extractor/merge-specs on line 106
make: *** [Makefile:35: openapi-spec] Fehler 255

[nickvergessen]

/backport to stable28

[nickvergessen]

/backport to stable27

[provokateurin]

It should instead use the one that is in the composer.lock of server to always have the correct one.