Update spectro third party image to 4.8 (#546)

Author: santhoshdaivajna

Earthfile

@@ -4,7 +4,8 @@ ARG TARGETARCH
 
 # Default image repositories used in the builds.
 ARG SPECTRO_PUB_REPO=us-docker.pkg.dev/palette-images
-ARG SPECTRO_THIRD_PARTY_IMAGE=us-docker.pkg.dev/palette-images/third-party/spectro-third-party:4.6
+ARG BUILDER_3RDPARTY_VERSION=4.8
+ARG SPECTRO_THIRD_PARTY_IMAGE=us-docker.pkg.dev/palette-images/third-party/spectro-third-party:$BUILDER_3RDPARTY_VERSION
 ARG ALPINE_TAG=3.20
 ARG ALPINE_IMG=$SPECTRO_PUB_REPO/edge/canvos/alpine:$ALPINE_TAG
 FROM $ALPINE_IMG