Post 1.12.0 release (#4308)

Author: Kielek

examples/demo/Dockerfile

@@ -1,7 +1,7 @@
 FROM mcr.microsoft.com/dotnet/sdk:8.0.412-jammy@sha256:10a559c5e8e315416a1ab84547c96859273f48c88a8b70faf0710ab98a15fafd
 
 # install OpenTelemetry .NET Automatic Instrumentation
-ARG OTEL_VERSION=1.11.0
+ARG OTEL_VERSION=1.12.0
 ENV OTEL_DOTNET_AUTO_HOME=/otel-dotnet-auto
 ADD https://github.com/open-telemetry/opentelemetry-dotnet-instrumentation/releases/download/v${OTEL_VERSION}/otel-dotnet-auto-install.sh otel-dotnet-auto-install.sh
 RUN apt-get update && apt-get install -y unzip && \