ci: install subversion in publish-svn workflows (#425)

Author: sherwinski

.github/workflows/publish-svn-v2.yml

@@ -22,6 +22,9 @@ jobs:
         with:
           fetch-depth: 0
 
+      - name: Install subversion
+        run: sudo apt-get update && sudo apt-get install -y subversion
+
       - name: Derive versions
         id: version
         run: |

.github/workflows/publish-svn.yml

@@ -20,6 +20,9 @@ jobs:
       - name: Checkout tagged commit
         uses: actions/checkout@v5
 
+      - name: Install subversion
+        run: sudo apt-get update && sudo apt-get install -y subversion
+
       - name: Strip v prefix from tag
         id: version
         run: echo "bare=${GITHUB_REF_NAME#v}" >> $GITHUB_OUTPUT