Fix typo

Change-Id: Ib9aac2a629352a25d80061c2d4ca420e8144a94b
Reviewed-on: https://gerrit.libreoffice.org/51683Reviewed-by: Julien Nabet <serval2412@yahoo.fr>
Tested-by: Jenkins <ci@libreoffice.org>

shell/source/backends/wininetbe/wininetbackend.cxx

@@ -160,7 +160,7 @@ WinInetBackend::WinInetBackend()
             // proxy is enabled or not
 
             // We use InternetQueryOptionW (see https://msdn.microsoft.com/en-us/library/aa385101);
-            // it fills INTERNET_PROXY_INFO struct which is definned in WinInet.h to have LPCTSTR
+            // it fills INTERNET_PROXY_INFO struct which is defined in WinInet.h to have LPCTSTR
             // (i.e., the UNICODE-dependent generic string type expanding to const wchar_t* when
             // UNICODE is defined, and InternetQueryOption macro expands to InternetQueryOptionW).
             // Thus, it's natural to expect that W version would return wide strings. But it's not