Change default version in Makefile
This was referencing `alpha1` instead of `v1alpha1` that is
referenced everywhere else.
@@ -5,7 +5,7 @@ PGOROOT ?= $(CURDIR)
PGO_BASEOS ?= centos8
PGO_IMAGE_PREFIX ?= crunchydata
PGO_IMAGE_TAG ?= $(PGO_BASEOS)-$(PGO_VERSION)
-PGO_VERSION ?= alpha1
+PGO_VERSION ?= v1alpha1
PGO_PG_VERSION ?= 13
PGO_PG_FULLVERSION ?= 13.2
PGO_BACKREST_VERSION ?= 2.29
