Fix CI failure on GitHub Actions due to missing apt-get update (#30069).

Patch by Katsuya HIDAKA (user:hidakatsuya).


git-svn-id: https://svn.redmine.org/redmine/trunk@23270 e93f8b46-1217-0410-a6f0-8f06a7374b81

.github/workflows/tests.yml

@@ -47,10 +47,9 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Install package dependencies
-        run: >
-          sudo apt-get install --yes --quiet
-          ghostscript
-          gsfonts
+        run: |
+          sudo apt-get update
+          sudo apt-get install --yes --quiet ghostscript gsfonts
 
       - name: Allow imagemagick to read PDF files
         run: |