Bump mysql-connector-python from 8.3.0 to 8.4.0 #380

Job	Run time
Documentation link check	35s
Build documentation	28s
Mypy (static type checker)	30s
Linters	47s
Packaging	21s
Py:3.8 - Tw:21.2 - ubuntu-latest	46s
Py:3.8 - Tw:22.1 - ubuntu-latest	43s
Py:3.8 - Tw:23.10 - ubuntu-latest	45s
Py:3.9 - Tw:21.2 - ubuntu-latest	44s
Py:3.9 - Tw:22.1 - ubuntu-latest	46s
Py:3.9 - Tw:23.10 - ubuntu-latest	43s
Py:3.10 - Tw:21.2 - ubuntu-latest	48s
Py:3.10 - Tw:22.1 - ubuntu-latest	47s
Py:3.10 - Tw:23.10 - ubuntu-latest	43s
Py:3.11 - Tw:21.2 - ubuntu-latest	42s
Py:3.11 - Tw:22.1 - ubuntu-latest	46s
Py:3.11 - Tw:23.10 - ubuntu-latest	45s
Py:3.12 - Tw:21.2 - ubuntu-latest	55s
Py:3.12 - Tw:22.1 - ubuntu-latest	56s
Py:3.12 - Tw:23.10 - ubuntu-latest	52s
Py:pypy-3.8 - Tw:current - ubuntu-latest	27s
Py:pypy-3.9 - Tw:current - ubuntu-latest	48s
-postgresPy:3.12 - Tw:23.10 - ubuntu-latest	58s
-mysqlPy:3.12 - Tw:23.10 - ubuntu-latest	55s
dbxs-required	1s
	17m 31s

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