patch 8.2.3642: list of distributed files is outdated

Problem:    List of distributed files is outdated.
Solution:   Rename term.h to termdefs.h.
diff --git a/Filelist b/Filelist
index 567b707..1ab6e1b 100644
--- a/Filelist
+++ b/Filelist
@@ -143,7 +143,7 @@
 		src/tag.c \
 		src/term.c \
 		src/terminal.c \
-		src/term.h \
+		src/termdefs.h \
 		src/termlib.c \
 		src/testing.c \
 		src/textformat.c \