Remove deprecated set-outputs

Signed-off-by: Yuki Okushi <jtitor@2k36.org>

Author: JohnTitor

.github/workflows/ci.yml

@@ -15,9 +15,9 @@ jobs:
         id: mdbook-version
         run: |
           . ./.env
-          echo "::set-output name=MDBOOK_VERSION::${MDBOOK_VERSION}"
-          echo "::set-output name=MDBOOK_LINKCHECK_VERSION::${MDBOOK_LINKCHECK_VERSION}"
-          echo "::set-output name=MDBOOK_TOC_VERSION::${MDBOOK_TOC_VERSION}"
+          echo "MDBOOK_VERSION=${MDBOOK_VERSION}" >> $GITHUB_OUTPUT
+          echo "MDBOOK_LINKCHECK_VERSION=${MDBOOK_LINKCHECK_VERSION}" >> $GITHUB_OUTPUT
+          echo "MDBOOK_TOC_VERSION=${MDBOOK_TOC_VERSION}" >> $GITHUB_OUTPUT
 
       - name: Cache binaries
         id: mdbook-cache
@@ -52,9 +52,9 @@ jobs:
         id: mdbook-version
         run: |
           . ./.env
-          echo "::set-output name=MDBOOK_VERSION::${MDBOOK_VERSION}"
-          echo "::set-output name=MDBOOK_LINKCHECK_VERSION::${MDBOOK_LINKCHECK_VERSION}"
-          echo "::set-output name=MDBOOK_TOC_VERSION::${MDBOOK_TOC_VERSION}"
+          echo "MDBOOK_VERSION=${MDBOOK_VERSION}" >> $GITHUB_OUTPUT
+          echo "MDBOOK_LINKCHECK_VERSION=${MDBOOK_LINKCHECK_VERSION}" >> $GITHUB_OUTPUT
+          echo "MDBOOK_TOC_VERSION=${MDBOOK_TOC_VERSION}" >> $GITHUB_OUTPUT
 
       - name: Cache binaries
         id: mdbook-cache

.github/workflows/gh-pages.yml

@@ -15,9 +15,9 @@ jobs:
         id: mdbook-version
         run: |
           . ./.env
-          echo "::set-output name=MDBOOK_VERSION::${MDBOOK_VERSION}"
-          echo "::set-output name=MDBOOK_LINKCHECK_VERSION::${MDBOOK_LINKCHECK_VERSION}"
-          echo "::set-output name=MDBOOK_TOC_VERSION::${MDBOOK_TOC_VERSION}"
+          echo "MDBOOK_VERSION=${MDBOOK_VERSION}" >> $GITHUB_OUTPUT
+          echo "MDBOOK_LINKCHECK_VERSION=${MDBOOK_LINKCHECK_VERSION}" >> $GITHUB_OUTPUT
+          echo "MDBOOK_TOC_VERSION=${MDBOOK_TOC_VERSION}" >> $GITHUB_OUTPUT
 
       - name: Cache binaries
         id: mdbook-cache