feColorMatrix: Update coefficients for luminanceToAlpha per the Filter Effects Module Level 1 spec
feColorMatrix: Update coefficients for luminanceToAlpha per the Filter Effects Module Level 1 spec

Old values from SVG 1.1: https://www.w3.org/TR/SVG11/filters.html#feColorMatrixElement

New values: https://drafts.fxtf.org/filter-effects/#element-attrdef-fecolormatrix-values

Part-of: <https://gitlab.gnome.org/GNOME/librsvg/-/merge_requests/763>

GNOME/librsvg,GNOME/librsvg,GNOME/librsvg,GNOME/librsvg