Fox compiler name in Dockerfile

Author: rhornung67

Dockerfile

@@ -21,7 +21,7 @@ RUN cmake -DCMAKE_CXX_COMPILER=g++ -DRAJA_ENABLE_WARNINGS=On -DRAJA_ENABLE_WARNI
     make -j 6 &&\
     ctest -T test --output-on-failure
 
-FROM ghcr.io/rse-ops/clang-ubuntu-22.04:llvm-13.0.0 AS clang13.0.0
+FROM ghcr.io/rse-ops/clang-ubuntu-22.04:llvm-13.0.0 AS clang13
 ENV GTEST_COLOR=1
 COPY . /home/raja/workspace
 WORKDIR /home/raja/workspace/build