github: change ccache board comparisons

Author: andyp1per

.github/workflows/test_ccache.yml

@@ -140,5 +140,5 @@ jobs:
         run: |
           PATH="/usr/lib/ccache:/opt/gcc-arm-none-eabi-${{matrix.gcc}}/bin:$PATH"
           Tools/scripts/build_tests/test_ccache.py --boards MatekF405,MatekF405-bdshot --min-cache-pct=75
-          Tools/scripts/build_tests/test_ccache.py --boards CubeOrange,Durandal --min-cache-pct=75
+          Tools/scripts/build_tests/test_ccache.py --boards Durandal,Pixhawk6X --min-cache-pct=73