jams/index.md: cleanup, JAMS logo, table

Add JAMS logo

Word wrap table contents
If page is printed the contents will show
https://pandemic-overview.readthedocs.io/en/latest/myGuides/reStructuredText-Tables-Examples.html

, → .

Setup → Set up

Change-Id: I21214646a2caaf35a2ffd731c46ccf4244753ffd