Make /usr/share/dotnet/ a link to the installed .NET.

Attempt to fix runners that are executing a published .NET application.

Author: bgrainger

linux/summerwind.Dockerfile

@@ -54,7 +54,8 @@ RUN curl -L https://dot.net/v1/dotnet-install.sh -o /home/runner/dotnet-install.
   /home/runner/dotnet-install.sh --install-dir $DOTNET_INSTALL_DIR --channel 8.0 && \
   /home/runner/dotnet-install.sh --install-dir $DOTNET_INSTALL_DIR --channel 9.0 && \
   /home/runner/dotnet-install.sh --install-dir $DOTNET_INSTALL_DIR --channel 10.0 && \
-  rm /home/runner/dotnet-install.sh
+  rm /home/runner/dotnet-install.sh && \
+  sudo ln -s /home/runner/.dotnet/ /usr/share/dotnet
 
 COPY docker-system-prune /etc/arc/hooks/job-completed.d/