Update mcr.microsoft.com/dotnet/runtime Docker tag to v10.0.3

Author: renovate[bot]

Dockerfile

@@ -1,5 +1,5 @@
 ARG BUILDTIME_IMAGE=mcr.microsoft.com/dotnet/sdk:10.0.103-alpine3.22-amd64
-ARG RUNTIME_IMAGE=mcr.microsoft.com/dotnet/runtime:10.0.2-alpine3.22-amd64
+ARG RUNTIME_IMAGE=mcr.microsoft.com/dotnet/runtime:10.0.3-alpine3.22-amd64
 
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 FROM ${BUILDTIME_IMAGE} AS init