Update the year to 2023 in the About dialog and Windows version resource.

cmake/MacOSXBundleInfo.plist.in

@@ -19,7 +19,7 @@
         <key>CFBundleShortVersionString</key>
         <string>${PROJECT_VERSION}</string>
         <key>NSHumanReadableCopyright</key>
-        <string>© 2008-2022 Jonathan Westhues and other authors</string>
+        <string>© 2008-2023 Jonathan Westhues and other authors</string>
         <key>NSPrincipalClass</key>
         <string>NSApplication</string>
         <key>NSMainNibFile</key>

res/win32/versioninfo.rc.in

@@ -18,7 +18,7 @@ BEGIN
             VALUE "FileVersion",      "${PROJECT_VERSION}~${solvespace_GIT_HASH}"
             VALUE "OriginalFilename", "solvespace.exe"
             VALUE "InternalName",     "solvespace"
-            VALUE "LegalCopyright",   "(c) 2008-2022 Jonathan Westhues and other authors"
+            VALUE "LegalCopyright",   "(c) 2008-2023 Jonathan Westhues and other authors"
         END
     END
 

src/solvespace.cpp

@@ -1099,7 +1099,7 @@ void SolveSpaceUI::MenuHelp(Command id) {
 "law. For details, visit http://gnu.org/licenses/\n"
 "\n"
 "© 2008-%d Jonathan Westhues and other authors.\n"),
-PACKAGE_VERSION, 2022);
+PACKAGE_VERSION, 2023);
             break;
 
         case Command::GITHUB: