Update release and ci workflows to use GITHUB_OUTPUT and bump `acti…

…ons/checkout` to v4. (#752)

* Update release workflow to use GITHUB_OUTPUT.

* Use actions/checkout@v4 for nightly builds

.github/scripts/publish_preflight_check.sh

@@ -71,7 +71,7 @@ if [[ ! "${RELEASE_VERSION}" =~ ^([0-9]*)\.([0-9]*)\.([0-9]*)$ ]]; then
 fi
 
 echo_info "Extracted release version: ${RELEASE_VERSION}"
-echo "::set-output name=version::v${RELEASE_VERSION}"
+echo "version=v${RELEASE_VERSION}" >> $GITHUB_OUTPUT
 
 
 echo_info ""
@@ -169,12 +169,12 @@ readonly CHANGELOG=`${CURRENT_DIR}/generate_changelog.sh`
 echo "$CHANGELOG"
 
 # Parse and preformat the text to handle multi-line output.
-# See https://github.community/t5/GitHub-Actions/set-output-Truncates-Multiline-Strings/td-p/37870
+# See https://docs.github.com/en/actions/using-workflows/workflow-commands-for-github-actions#example-of-a-multiline-string
+# and https://github.com/github/docs/issues/21529#issue-1418590935
 FILTERED_CHANGELOG=`echo "$CHANGELOG" | grep -v "\\[INFO\\]"`
-FILTERED_CHANGELOG="${FILTERED_CHANGELOG//'%'/'%25'}"
-FILTERED_CHANGELOG="${FILTERED_CHANGELOG//$'\n'/'%0A'}"
-FILTERED_CHANGELOG="${FILTERED_CHANGELOG//$'\r'/'%0D'}"
-echo "::set-output name=changelog::${FILTERED_CHANGELOG}"
+echo "changelog<<CHANGELOGEOF" >> $GITHUB_OUTPUT
+echo "$FILTERED_CHANGELOG" >> $GITHUB_OUTPUT
+echo "CHANGELOGEOF" >> $GITHUB_OUTPUT
 
 
 echo ""

.github/workflows/nightly.yml

@@ -29,7 +29,7 @@ jobs:
 
     steps:
     - name: Checkout source for staging
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         ref: ${{ github.event.client_payload.ref || github.ref }}
 

.github/workflows/release.yml

@@ -40,7 +40,7 @@ jobs:
     # via the 'ref' client parameter.
     steps:
     - name: Checkout source for staging
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
       with:
         ref: ${{ github.event.client_payload.ref || github.ref }}
 
@@ -95,7 +95,7 @@ jobs:
 
     steps:
     - name: Checkout source for publish
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
 
     # Download the artifacts created by the stage_release job.
     - name: Download release candidates