[ Help ]: Update SPDX License Identifiers

src/Mod/Help/CMakeLists.txt

@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 IF (BUILD_GUI)
     PYSIDE_WRAP_RC(Help_QRC_SRCS Resources/Help.qrc)
 ENDIF (BUILD_GUI)

src/Mod/Help/Help.py

@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # ***************************************************************************
 # *   Copyright (c) 2021 Yorik van Havre <yorik@uncreated.net>              *
 # *                                                                         *

src/Mod/Help/InitGui.py

@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # ***************************************************************************
 # *   Copyright (c) 2021 Yorik van Havre <yorik@uncreated.net>              *
 # *                                                                         *

src/Mod/Help/default.css

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
 /* our own FreeCAD styling */
 
 html { color: #000000; font-family: "sans"; background: #ffffff; }