Fix suitesparse checksum refresh naming mismatch (#40943)

Without this change, suitesparse checksum files don't get packed
properly.

Author: staticfloat

contrib/refresh_checksums.mk

@@ -103,6 +103,11 @@ pack-checksum-llvm: | checksum-llvm-tools
 pack-checksum-csl: | pack-checksum-compilersupportlibraries
 pack-checksum-compilersupportlibraries: | checksum-csl
 
+# We need to adjust to the fact that the checksum files are called `suitesparse`
+pack-checksum-libsuitesparse: | pack-checksum-suitesparse
+	@# nothing to do but disable the prefix rule
+pack-checksum-suitesparse: | checksum-libsuitesparse
+
 # define how to pack parallel checksums into a single file format
 pack-checksum-%: FORCE
 	@echo making "$(JULIAHOME)/deps/checksums/$*"