Update dependency io.buji:buji-pac4j to v9 (main)

[mend-for-github-com]

This PR contains the following updates:

Package	Type	Update	Change
io.buji:buji-pac4j	compile	major	3.2.0 → 9.1.1

By merging this PR, the issue #156 will be automatically resolved and closed:

Severity	CVSS Score	Vulnerability	Reachability
High	7.3	CVE-2014-0114
High	7.3	CVE-2019-10086
Medium	6.1	CVE-2023-46750
Medium	5.3	CVE-2026-23903
Low	2.5	CVE-2026-23901

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