Fix TexText not rendered into the screen.

For example when running example_scene.py OpeningManimExample,
the latex:
        complex_map_words = TexText("""
            Or thinking of the plane as $\\mathds{C}$,\\\\
            this is the map $z \\rightarrow z^2$
        """)
is not rendered on screen.

Author: irvanalhaq9

manimlib/tex_templates.yml

@@ -7,6 +7,7 @@ default:
     \usepackage[english]{babel}
     \usepackage[utf8]{inputenc}
     \usepackage[T1]{fontenc}
+    \usepackage{lmodern}  % Tambahkan ini
     \usepackage{amsmath}
     \usepackage{amssymb}
     \usepackage{dsfont}