Revert back to building release type

Author: Damir Porobic

.github/scripts/setup_build_variables.sh

@@ -7,7 +7,7 @@ VERSION_NUMBER=$(grep "project.*" CMakeLists.txt | egrep -o "${VERSION_REGEX}")
 WORKSPACE="$GITHUB_WORKSPACE"
 INSTALL_PREFIX="$WORKSPACE/tmp"
 
-echo "BUILD_TYPE=Debug" >> $GITHUB_ENV
+echo "BUILD_TYPE=Release" >> $GITHUB_ENV
 echo "BUILD_TIME=$BUILD_TIME" >> $GITHUB_ENV
 echo "BUILD_DATE=$BUILD_DATE" >> $GITHUB_ENV
 echo "WORKSPACE=$WORKSPACE" >> $GITHUB_ENV