chore: move the workflows off the deprecated Node 20 actions

The runners force actions/checkout@v4 and the artifact actions onto Node 24
already and warn about it on every run. Current majors instead, so the
annotation goes away and the pin says what is actually running.

.github/workflows/check.yml

@@ -11,7 +11,7 @@ jobs:
     name: syntax and shellcheck
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       # The Makefile skips whatever is missing rather than failing, so the
       # tools it looks for have to be here or the check checks less than it

.github/workflows/release.yml

@@ -20,7 +20,7 @@ jobs:
           apt-get install -y --no-install-recommends \
             ca-certificates git make gettext scdoc dpkg-dev
 
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - name: Check the tag against the Makefile
         run: packaging/check-version.sh "${{ github.ref_name }}"
@@ -32,7 +32,7 @@ jobs:
           dpkg-deb --info dist/*.deb
           dpkg-deb --contents dist/*.deb
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v7
         with:
           name: deb
           path: dist/*.deb
@@ -48,7 +48,7 @@ jobs:
           dnf install -y --setopt=install_weak_deps=False \
             git make gettext scdoc tar rpm-build rpm-sign systemd-rpm-macros
 
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - name: Check the tag against the Makefile
         run: packaging/check-version.sh "${{ github.ref_name }}"
@@ -75,7 +75,7 @@ jobs:
           rpm -qip dist/*.rpm
           rpm -qlp dist/*.rpm
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v7
         with:
           name: rpm
           path: dist/*.rpm
@@ -87,9 +87,9 @@ jobs:
     if: startsWith(github.ref, 'refs/tags/v')
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@v8
         with:
           path: incoming
           merge-multiple: true
@@ -125,7 +125,7 @@ jobs:
 
       - name: Check out the published repositories
         if: steps.key.outputs.present == 'yes'
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
         with:
           ref: gh-pages
           path: pages