Merge branch 'fix-tag-separator' into 'main'

Fix tag separator for version strings

See merge request nvidia/container-toolkit/libnvidia-container!237

Author: Evan Lezar

versions.mk

@@ -46,4 +46,4 @@ PATCH := $(word 3,$(VERSION_PARTS))
 VERSION := $(LIB_VERSION)
 TAG := $(LIB_TAG)
 BUILD := $(LIB_BUILD)
-VERSION_STRING := $(LIB_VERSION)$(if $(TAG),-$(TAG),)$(if $(BUILD),+$(BUILD),)
+VERSION_STRING := $(LIB_VERSION)$(if $(TAG),~$(TAG),)$(if $(BUILD),+$(BUILD),)