chore(deps): pin ubuntu docker tag to 2e863c4

Signed-off-by: renovate[bot] <[email protected]>

Dockerfile

@@ -9,7 +9,7 @@ RUN apk add --no-cache git make ca-certificates
 COPY . .
 RUN make
 
-FROM ubuntu:24.04
+FROM ubuntu:24.04@sha256:2e863c44b718727c860746568e1d54afd13b2fa71b160f5cd9058fc436217b30
 LABEL maintainer="[email protected]"
 WORKDIR /root/app
 COPY --from=builder /go/src/github.com/cilium/cilium-cli/cilium /usr/local/bin/cilium