docs(release): update release notes for mf6.6.1 (#2204)

* docs(release): update release notes for new release

* cleanup

Author: christianlangevin

doc/ReleaseNotes/ReleaseNotes.tex

@@ -181,6 +181,7 @@ \section{Release History}
 6.4.4 & February 13, 2024 & \url{https://doi.org/10.5066/P9FL1JCC} \\
 6.5.0 & May 23, 2024 & \url{https://doi.org/10.5066/P13COJJM} \\
 6.6.0 & December 19, 2024 & \url{https://doi.org/10.5066/P1DXFBUR} \\
+6.6.1 & February 7, 2025 & \url{https://doi.org/10.5066/P1DXFBUR} \\
 \hline
 \label{tab:releases}
 \end{tabular*}
@@ -193,9 +194,7 @@ \section{Release History}
 \section{Changes Introduced in this Release}
 This section describes changes introduced into MODFLOW~6 for the current release.  These changes may substantially affect users.
 
-\begin{itemize}
 \input{develop.tex}
-\end{itemize}
 
 % -------------------------------------------------
 \section{Known Issues and Incompatibilities}

doc/ReleaseNotes/develop.tex

@@ -1,14 +1,15 @@
 % Use this template for starting initializing the release notes
 % after a release has just been made.
 
-\item \currentmodflowversion
-	
-%\underline{NEW FUNCTIONALITY}
-%\begin{itemize}
+%\item \currentmodflowversion
+\subsection{Version mf6.6.1---February 7, 2025}
+
+\underline{NEW FUNCTIONALITY}
+\begin{itemize}
 	\item Support for adjusting time step lengths using the adaptive time stepping (ATS) capability was added to the GWT Advection (ADV) Package of the Groundwater Transport (GWT) Model in release 6.6.0.  The same functionality that was added to GWT is now available with the Groundwater Energy Transport (GWE) Model.  A description of how this functionality works and how to activate it can be found in the release notes for version 6.6.0 (Appendix A) and in the MODFLOW 6 input-output guide.
 	\item The binary grid file written by MODFLOW 6 for DISU models did not include the IDOMAIN array.  The binary grid file now includes IDOMAIN for all discretization types, including DISU.
 %	\item xxx
-%\end{itemize}
+\end{itemize}
 
 %\underline{EXAMPLES}
 %\begin{itemize}

doc/ReleaseNotes/vx.y.z-template.tex

@@ -1,7 +1,7 @@
 % Use this template for starting initializing the release notes
 % after a release has just been made.
 
-	\item \currentmodflowversion
+	\subsection{\currentmodflowversion}
 
 	%\underline{NEW FUNCTIONALITY}
 	%\begin{itemize}