Update GH actions

.github/workflows/build.yml

@@ -10,7 +10,7 @@ jobs:
     name: Build the Jekyll site
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - run: sudo apt install bundler
       - run: bundle install
       - run: bundle exec jekyll build

.github/workflows/sync.yml

@@ -13,15 +13,15 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: "Check out the GapWWW repository in order to make changes to it"
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: "Clone GAP for its most up-to-date release scripts"
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           repository: gap-system/gap
           ref: master
           path: tmp/gap/
           fetch-depth: 1
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: 3.9
       - name: "Install the required Python modules"
@@ -33,7 +33,7 @@ jobs:
       - name: "Remove GAP clone"
         run: rm -rf ./tmp/gap
       - name: "Make a pull request to the master branch of this repository"
-        uses: peter-evans/create-pull-request@v4
+        uses: peter-evans/create-pull-request@v6
         with:
           base: master
           branch: auto/sync-with-github-releases