Update dependency mysql:mysql-connector-java to v8

[mend-for-github-com]

This PR contains the following updates:

Package	Type	Update	Change
mysql:mysql-connector-java	compile	major	5.1.35 -> 8.0.28

By merging this PR, the issue #39 will be automatically resolved and closed:

Severity	CVSS Score	CVE	Reachability
High	8.5	CVE-2017-3523	Unreachable
High	8.3	CVE-2023-22102	Unreachable
Medium	6.6	CVE-2022-21363	Unreachable
Medium	6.4	CVE-2017-3586	Unreachable
Medium	6.3	CVE-2019-2692	Unreachable
Medium	5.0	CVE-2020-2934	Unreachable
Medium	4.7	CVE-2020-2875	Unreachable
Low	3.3	CVE-2017-3589	Unreachable
Low	2.2	CVE-2020-2933	Unreachable

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