Upgrade fontawesome7 (#301)

* upgrade to fontawesome7

* [threema social] fix copy past error for the icon letter version

* adds upgrade to fontawesome7 to CHANGELOG

CHANGELOG

@@ -1,3 +1,6 @@
+version next
+- Upgrade to Fontawesome 7 (#270)
+
 version 2.6.1 (24 Jun 2026)
 - Allow the customisation of the contemporary style (#297)
 - Correct the documented style option defaults, changing them from nodetails to

manual/moderncv_userguide.tex

@@ -830,12 +830,12 @@ As an alternative the appearing link and string after the symbol can be customiz
 
 \paragraph{Note.}
 The possible options for \code{<\\symbol>} depend on the package that is used.
-By default, the \code{marvosym} package is loaded if \code{pdflatex} is used, and the \code{academicons} and \code{fontawesome6} packages are loaded if either \code{lualatex} or \code{xelatex} is used.
+By default, the \code{marvosym} package is loaded if \code{pdflatex} is used, and the \code{academicons} and \code{fontawesome7} packages are loaded if either \code{lualatex} or \code{xelatex} is used.
 Full lists of all available symbols and icons can be found in the documentation of each respective package:
 
 \begin{tabular}{l}
   \url{https://ctan.org/pkg/marvosym} \\[1ex]
-  \url{https://ctan.org/pkg/fontawesome6} \\[1ex]
+  \url{https://ctan.org/pkg/fontawesome7} \\[1ex]
   \url{https://ctan.org/pkg/academicons}
 \end{tabular}
 
@@ -1104,7 +1104,7 @@ In addition to the packages that \Moderncv provides, the following packages are
     \item \code{expl3}
     \item \code{tikz}
     \item \code{changepage}
-    \item \code{fontawesome6}
+    \item \code{fontawesome7}
     \item \code{academicons}
     \item \code{tgpagella}
     \item \code{ebgaramond}

moderncviconsawesome.sty

@@ -16,7 +16,7 @@
 %                required packages
 %-------------------------------------------------------------------------------
 % Font Awesome font
-\RequirePackage{fontawesome6}
+\RequirePackage{fontawesome7}
 \RequirePackage{xcolor}
 
 %-------------------------------------------------------------------------------

moderncviconsletters.sty

@@ -60,7 +60,7 @@
 \renewcommand*{\arxivsocialsymbol}        {\textbf{arx}~}
 \renewcommand*{\inspiresocialsymbol}      {\textbf{ins}~}
 \renewcommand*{\simplexsocialsymbol}      {\textbf{splx}~}
-\renewcommand*{\simplexsocialsymbol}      {\textbf{thr}~}
+\renewcommand*{\threemasocialsymbol}      {\textbf{thr}~}
 
 \renewcommand*{\listitemsymbol}      {\labelitemi~}