feat: update CLI to release (#60)

Co-authored-by: J. Doe (https://devcenter.bitrise.io/builds/setting-your-git-credentials-on-build-machines/) <[email protected]>

step.sh

@@ -30,7 +30,7 @@ echo "Bitrise Build Cache is activated in this workspace, configuring the build
 set -x
 
 # download the Bitrise Build Cache CLI
-export BITRISE_BUILD_CACHE_CLI_VERSION="v0.15.12"
+export BITRISE_BUILD_CACHE_CLI_VERSION="v0.15.13"
 curl --retry 5 -sSfL 'https://raw.githubusercontent.com/bitrise-io/bitrise-build-cache-cli/main/install/installer.sh' | sh -s -- -b /tmp/bin -d $BITRISE_BUILD_CACHE_CLI_VERSION
 
 if [ "$collect_metrics" != "true" ] && [ "$collect_metrics" != "false" ]; then