chore(deps): update ghcr.io/tailscale/tailscale docker tag to v1.74.1 (…

…#596)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Dockerfile.tailscale

@@ -15,7 +15,7 @@ RUN --mount=type=cache,target=/go/pkg/mod \
 	--mount=type=cache,target=/root/.cache/go-build \
 	make build-tailscale-starter CGO_ENABLED=${CGO_ENABLED} GOOS=${TARGETOS} GOARCH=${TARGETARCH}
 
-FROM --platform=${BUILDPLATFORM:-linux/amd64} ghcr.io/tailscale/tailscale:v1.72.1
+FROM --platform=${BUILDPLATFORM:-linux/amd64} ghcr.io/tailscale/tailscale:v1.74.1
 LABEL source_repository="https://github.com/cloudoperators/greenhouse"
 
 # upgrade all installed packages to fix potential CVEs in advance