chore(deps): update ubuntu:22.04 docker digest to 19478ce

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
ubuntu	digest	a6d2b38 -> 19478ce

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Configuration

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[github-actions[bot]]

Test coverage for bb1ce27191f2400d3f32f98508973586ad96ae4a

Name              Stmts   Miss Branch BrPart  Cover   Missing
-------------------------------------------------------------
src/charm.py        317     27     78     12    90%   181, 189-190, 202, 334->342, 375->380, 392, 574-576, 581-582, 594-596, 601-602, 614-616, 639-641, 683->exit, 693->exit, 723-729, 755->exit, 769-770, 780->exit, 794
src/database.py      29      1      8      1    95%   56
-------------------------------------------------------------
TOTAL               346     28     86     13    91%

Static code analysis report

Run started:2024-06-05 05:06:45.163017

Test results:
    No issues identified.

Code scanned:
    Total lines of code: 2043
    Total lines skipped (#nosec): 3
    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):