Dockerfile: do not prefix release version with 'v'

Signed-off-by: Eguzki Astiz Lezaun <[email protected]>

Dockerfile

@@ -28,7 +28,7 @@ COPY internal/ internal/
 # was called. For example, if we call make docker-build in a local env which has the Apple Silicon M1 SO
 # the docker BUILDPLATFORM arg will be linux/arm64 when for Apple x86 it will be linux/amd64. Therefore,
 # by leaving it empty we can ensure that the container and binary shipped on it will have the same platform.
-RUN CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} go build -ldflags "-X main.version=v${VERSION} -X main.gitSHA=${GIT_SHA} -X main.dirty=${DIRTY}" -a -o manager cmd/main.go
+RUN CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} go build -ldflags "-X main.version=${VERSION} -X main.gitSHA=${GIT_SHA} -X main.dirty=${DIRTY}" -a -o manager cmd/main.go
 
 # Use distroless as minimal base image to package the manager binary
 # Refer to https://github.com/GoogleContainerTools/distroless for more details