Point ci-toolkit back to release

Since a faulty `git-crypt` existed in the plugin at that commit and was thus picked up instead

Author: AliSoftware

.buildkite/commands/decrypt-secrets.sh

@@ -19,7 +19,7 @@ env_var_name=${1:-GIT_CONCEAL_SECRET_KEY}
 # If installed in the $PATH, execute it (replacing this current process)
 echo "Searching for git-conceal binary in PATH..."
 if command -v git-conceal &> /dev/null; then
-    echo "git-conceal binary found in $PATH, running 'git-conceal unlock env:${env_var_name}'"
+    echo "git-conceal binary found in PATH at $(command -v git-conceal). Running 'git-conceal unlock env:${env_var_name}'"
     git-conceal unlock "env:${env_var_name}"
     exit $?
 fi
@@ -28,13 +28,13 @@ INSTALL_DIR="${PWD}"
 echo "Searching for git-conceal binary in ${INSTALL_DIR}..."
 # If was already previously installed in INSTALL_DIR, execute it (replacing this current process)
 if [[ -x "${INSTALL_DIR}/git-conceal" ]]; then
-    echo "git-conceal binary found in ${INSTALL_DIR}, running 'git-conceal unlock env:${env_var_name}'"
+    echo "git-conceal binary found in ${INSTALL_DIR}. Running 'git-conceal unlock env:${env_var_name}'"
     "${INSTALL_DIR}/git-conceal" unlock "env:${env_var_name}"
     exit $?
 fi
 
 # Otherwise, install it locally and execute it
-echo "git-conceal binary not found in ${INSTALL_DIR}, installing it..."
+echo "git-conceal binary not found in ${INSTALL_DIR}. Installing it..."
 mkdir -p "${INSTALL_DIR}"
 curl -fsSL https://raw.githubusercontent.com/Automattic/git-conceal/install-script/install.sh | bash -s -- --prefix "${INSTALL_DIR}"
 echo "git-conceal installed successfully"

.buildkite/shared-pipeline-vars

@@ -3,7 +3,6 @@
 # This file is `source`'d before calling `buildkite-agent pipeline upload`, and can be used
 # to set up some variables that will be interpolated in the `.yml` pipeline before uploading it.
 
-# "git-crypt-unlock" branch / https://github.com/Automattic/a8c-ci-toolkit-buildkite-plugin/pull/195
-export CI_TOOLKIT="automattic/a8c-ci-toolkit#13e3bb6349f69fb78bf7157367be727489bb1fb2"
+export CI_TOOLKIT="automattic/a8c-ci-toolkit#5.7.0"
 export TEST_COLLECTOR="test-collector#v1.10.1"
 export CLAUDE_PLUGIN="claude-summarize#v1.1.0"