Fix prerelease workflow (#32)

* fix: update version extraction in Makefile to remove 'v' prefix and use tee for VERSION.md

Makefile

@@ -157,7 +157,7 @@ clean:
 
 OS := $(shell uname -o)
 CPU := $(shell uname -m)
-ver:=$(shell V=$$(git describe --tags --always); printf $${V} > ./VERSION.md; cat ./VERSION.md)
+ver := $(shell git describe --tags --always | sed 's/^v//' | tee VERSION.md)
 rpm_ver := $(shell echo $(ver) | sed 's/-/_/g')
 $(info ver is $(ver) and rpm_ver is $(rpm_ver))
 GO_LDFLAGS="-X 'asvec/cmd.Version=$(ver)' -s -w"