fix: add alternative link to tex font formula fontist/fontist#382

Author: CAMOBAP

Formulas/tex.yml

@@ -6,6 +6,7 @@ resources:
   TeX.zip:
     urls:
     - https://www.gust.org.pl/projects/e-foundry/tex-gyre/whole/tg2_501otf.zip
+    - https://web.archive.org/web/20210213120450/https://www.gust.org.pl/projects/e-foundry/tex-gyre/whole/tg2_501otf.zip
     sha256: d7f8be5317bec4e644cf16c5abf876abeeb83c43dbec0ccb4eee4516b73b1bbe
     file_size: 2559336
 fonts: