Issue with Quicksand[wght].ttf

Hi,

I've been using these fonts as part of a base docker image creating latex PDF's. It's been working fine with the last update about 9 months ago, but I recently updated the base docker image, which pulled the very latest Google fonts. I'm now having an issue building the latex file. The relevant error is `xdvipdfmx:fatal: Invalid TTC index (not TTC font): /usr/local/share/fonts/Quicksand[wght].ttf`. That error in some context:

```
/usr/share/texlive/texmf-dist/tex/latex/tools/tabularx.sty
(/usr/share/texlive/texmf-dist/tex/latex/tools/array.sty)))
(/usr/share/texlive/texmf-dist/tex/xelatex/xecjk/xeCJK-listings.sty)
(./main.aux)
*geometry* driver: auto-detecting
*geometry* detected driver: xetex
ABD: EveryShipout initializing macros
(/usr/share/texlive/texmf-dist/tex/latex/base/inputenc.sty)

LaTeX Font Warning: Font shape `TU/Quicksand(0)/m/sl' undefined
(Font) using `TU/Quicksand(0)/m/n' instead on input line 52.

Package Fancyhdr Warning: \headheight is too small (12.0pt):
Make it at least 14.49998pt.
We now make it that large for the rest of the document.
This may cause the page layout to be inconsistent, however.

[1] (./main.aux)

LaTeX Font Warning: Some font shapes were not available, defaults substituted.

xdvipdfmx:fatal: Invalid TTC index (not TTC font): /usr/local/share/fonts/Quicksand[wght].ttf

Output file removed.
)
Error 256 (driver return code) generating output;
file main.pdf may not be valid.
SyncTeX written on main.synctex.gz.
Transcript written on main.log.
=== TeX engine is 'XeTeX'
Latexmk: Errors, so I did not complete making targets
Collected error summary (may duplicate other messages):
pdflatex: Command for 'pdflatex' gave return code 1
Refer to 'main.log' for details
Latexmk: Use the -f option to force complete processing,
unless error was exceeding maximum runs, or warnings treated as errors.
```

Removing this file from my system enables me to build the PDF without issue.

I don't understand the details of fonts well enough to understand who or what is at fault. I thought I'd post this here in case someone can point me in the right direction -- is this an issue with this ttf file, or something else?

Thanks!