Fix Komga chapter date not displayed

[JBLOGNON]

Fixing the probleme where chapter date where not displayed due to format change in date on "Komga Server" > 0.155.2

Checklist:

• [x] Updated source's version for individual source changes
• [x] Did not change id even if a source's name or language were changed
• [x] Tested the modifications by running it on the simulator or a test device

Fix #496