Set the installer call-out in red italics.

GitHub strips style attributes from README HTML, so the only route to coloured
text is the inline math renderer. textsf keeps it in the body sans-serif rather
than the serif math default.

Author: Stew Alexander

README.md

@@ -7,7 +7,7 @@ replaces, and what Debian actually calls it once installed.
 
 **Tools by job —** [Files, search, disk](#files-search-and-disk-8) · [Shell & prompt](#shell-and-prompt-4) · [`ls` replacements](#ls-replacements-2) · [Editors](#text-editors-and-viewers-7) · [Monitors](#process-and-system-monitors-5) · [Network](#network-10) · [Git](#git-3) · [Data & documents](#data-and-documents-5) · [System & packages](#system-and-packages-6) · [Docs & benchmarks](#docs-containers-and-benchmarks-6) · [File explorers](#terminal-file-explorers-3) · [Desktop GUI](#desktop-gui-apps-5)
 
-**Or just download them all —** [`Lazy-Linux-Tool-Installer.py`](Lazy-Linux-Tool-Installer.py)
+$\textcolor{red}{\textit{\textsf{Or just download them all}}}$ — [`Lazy-Linux-Tool-Installer.py`](Lazy-Linux-Tool-Installer.py)
 installs everything below that you do not already have:
 
 ```bash