Fallbackfonts for Aptos Narrow in html-export

[swmal]

We need to ensure that Aptos Narrow (default font in Excel) gets fallbacks in the css.

Example from current css:

table.epplus-table {
    font-family: Aptos Narrow;
    font-size: 11pt;
    border-spacing: 0;
    border-collapse: collapse;
    word-wrap: break-word;
    white-space: nowrap;
}

The following is used in the svg-export:

font-family: Aptos Narrow,Aptos Narrow_MSFontService,sans-serif