Rename SHA256SUM to SHA256SUMS

rom1v · rom1v · commit f1b3a403752c · 2018-05-28T22:32:14.000+02:00
It contains the checksums for several files.
diff --git a/Makefile.CrossWindows b/Makefile.CrossWindows
@@ -128,4 +128,4 @@ zip-win64: dist-win64
 
 sums:
 	cd "$(DIST)"; \
-		sha256sum *.zip > SHA256SUM.txt
+		sha256sum *.zip > SHA256SUMS.txt
