Rename legal.txt to LEGAL.txt

Cube · web-flow · commit 657a0d9ab570 · 2024-02-04T10:44:44.000+08:00
diff --git a/LEGAL.txt b/LEGAL.txt
@@ -1036,4 +1036,4 @@ Code generated by the Protocol Buffer compiler is owned by the owner
 of the input file used when generating it.  This code is not
 standalone and requires a support library to be linked with it.  This
 support library is itself covered by the above license.
-===================================================================================
+===================================================================================
