ci: upgrade actions/checkout, migrate set-output to $GITHUB_OUTPUT

Author: LinqLover

.github/workflows/build.yml

@@ -6,7 +6,7 @@ jobs:
   create-image:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: LinqLover/create-image@master
         id: create-image
         with:
@@ -21,7 +21,7 @@ jobs:
     needs: create-image
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/download-artifact@master
         with:
           name: image
@@ -45,7 +45,7 @@ jobs:
       - build-screenshots
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           ref: gh-pages
       - run: rm -rf screenshots/ help/
@@ -114,7 +114,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - id: date
-        run: echo "::set-output name=date::$(date +'%Y%m%d-%H%M%S')"
+        run: echo "date=$(date +'%Y%m%d-%H%M%S')" >> "$GITHUB_OUTPUT"
       - uses: actions/download-artifact@master
         with:
           name: image

.github/workflows/tests.yml

@@ -8,7 +8,7 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - id: smalltalkci
         uses: hpi-swa/setup-smalltalkCI@v1
         with:
@@ -26,7 +26,7 @@ jobs:
       runs-on: ubuntu-latest
       needs: test
       steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - id: smalltalkci
         uses: hpi-swa/setup-smalltalkCI@v1
         with:

scripts/download_vm.sh

@@ -4,4 +4,4 @@ set -e
 # Download latest Trunk bundle for Linux/x64 and extract VM
 wget https://files.squeak.org/nightly/Squeak-latest-64bit-Linux-x64.tar.gz
 tar -zxvf Squeak-latest-64bit-Linux-x64.tar.gz --wildcards '*/bin'
-echo ::set-output name=vm-path::"$(realpath Squeak*/bin/squeak)"
+echo "vm-path=$(realpath Squeak*/bin/squeak)" >> "$GITHUB_OUTPUT"