companies: fix typo and quote symbol

Reported-by: Marius Albrecht
Fixes #430

Author: vszakats

docs/_companies.html

@@ -426,7 +426,7 @@
 
 <li> <a href="https://www.micromuse.com/">Micromuse Inc.</a>
 
-<li> <a href="https://www.microsoft.com/">Microsoft</a> ships curl as part of Windows 10, they uses curl in vcpkg for non-windows platforms and libcurl for .NET&qout;s HttpClient.
+<li> <a href="https://www.microsoft.com/">Microsoft</a> ships curl as part of Windows 10, they use curl in vcpkg for non-windows platforms and libcurl for .NET&#39;s HttpClient.
 
 <li> <a href="https://www.miniclip.com/">Miniclip</a>