[project-builder] Use fixed scala-cli version in Dockerfile

Author: WojciechMazur

project-builder/Dockerfile

@@ -4,7 +4,7 @@ RUN apt install -y jq
 ENV PATH="/root/.local/share/coursier/bin:${PATH}"
 RUN curl -fLo coursier https://github.com/coursier/launchers/raw/master/coursier && \
     chmod +x coursier && \
-    ./coursier install mill:0.10.10 scalafix scala-cli --contrib \
+    ./coursier install mill:0.10.10 scalafix scala-cli:1.0.0-RC2 --contrib \
     && sh -c "mill --version" \
     && sh -c "scalafix --version" \
     && sh -c "scala-cli --version" && \