Fix broken multiline strings from dee0c94 (#1390)

1. Escaping behavior changed as a result of set-output deprecation.
-  Otherwise you'll encounter breaking changes for example "appVersion: "1.0.0"%0Aapplica..."
   where %0A is escaped newline \n but shouldn't be escaped.

2. Delimeter is required for multiline strings.
-  See here: https://docs.github.com/en/actions/using-workflows/workflow-commands-for-github-actions#multiline-strings
-  Delimeter must be random. UUID is a solid choice.
   I verified that /proc/sys/kernel/random/uuid does indeed exist on the yq image.

Author: mattphelps-8451

github-action/entrypoint.sh

@@ -2,10 +2,11 @@
 set -e
 echo "::debug::\$cmd: $1"
 RESULT=$(eval "$1")
-RESULT="${RESULT//'%'/'%25'}"
-RESULT="${RESULT//$'\n'/'%0A'}"
-RESULT="${RESULT//$'\r'/'%0D'}"
 echo "::debug::\$RESULT: $RESULT"
 # updating from 
+# https://github.com/orgs/community/discussions/26288#discussioncomment-3876281
 # https://docs.github.com/en/actions/using-workflows/workflow-commands-for-github-actions#setting-an-output-parameter
-echo "result=$RESULT" >> $GITHUB_OUTPUT
+delimiter=$(cat /proc/sys/kernel/random/uuid)
+echo "result<<${delimiter}" >> "${GITHUB_OUTPUT}"
+echo "${RESULT}" >> "${GITHUB_OUTPUT}"
+echo "${delimiter}" >> "${GITHUB_OUTPUT}"