Update Wordpress to 6.4.2

[gtrkiller]

Applicable spec:

Overview

Update wordpress version to latest.

Rationale

N/A

Juju Events Changes

N/A

Module Changes

N/A

Library Changes

N/A

Checklist

• The charm style guide was applied
• The contributing guide was applied
• The changes are compliant with ISD054 - Managing Charm Complexity
• The documentation is generated using src-docs
• The documentation for charmhub is updated.
• The PR is tagged with appropriate label (urgent, trivial, complex)

[arturo-seijas]

Can you remove the related CVEs from the .trivyignore too?

[github-actions]

Test coverage for 9367849

Name                Stmts   Miss Branch BrPart  Cover   Missing
---------------------------------------------------------------
src/charm.py          549     37    182     33    90%   191-194, 358-359, 418->422, 571, 602, 608, 625-629, 659, 694-695, 749, 758, 860->865, 864, 866, 871-872, 932, 950, 957, 1047, 1056, 1068, 1089, 1098, 1117, 1121, 1150, 1203, 1335, 1357, 1364->1366, 1409->exit, 1421, 1437, 1474, 1483-1484
src/cos.py             15      0      0      0   100%
src/exceptions.py      17      1      2      1    89%   41
src/state.py           34      0      4      0   100%
src/types_.py          16      0      0      0   100%
---------------------------------------------------------------
TOTAL                 631     38    188     34    91%

Static code analysis report

Run started:2024-01-16 12:50:42.520287

Test results:
  No issues identified.

Code scanned:
  Total lines of code: 4473
  Total lines skipped (#nosec): 1
  Total potential issues skipped due to specifically being disabled (e.g., #nosec BXXX): 0

Run metrics:
  Total issues (by severity):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
  Total issues (by confidence):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
Files skipped (0):