ci: replace deprecated set-output with GITHUB_OUTPUT

updates github actions to use environment files instead of deprecated
set-output commands

Author: lidel

.github/actions/latest-kubo-tag/entrypoint.sh

@@ -14,4 +14,4 @@ cd kubo
 git describe --tags "${LATEST_IPFS_TAG}"
 
 echo "The latest Kubo tag is ${LATEST_IPFS_TAG}"
-echo "::set-output name=latest_tag::${LATEST_IPFS_TAG}"
+echo "latest_tag=${LATEST_IPFS_TAG}" >> $GITHUB_OUTPUT

.github/actions/update-with-latest-versions/entrypoint.sh

@@ -85,4 +85,4 @@ git config --global user.name "${GITHUB_ACTOR}@users.noreply.github.com"
 git add -u
 git commit -m "Bumped documentation & installation docs."
 git push -fu origin ${BRANCH}
-echo "::set-output name=updated_branch::${BRANCH}"
+echo "updated_branch=${BRANCH}" >> $GITHUB_OUTPUT