fixup! Hardcode Ubuntu version for CI.

.github/workflows/main.yml

@@ -2,14 +2,18 @@ name: CI pipeline
 
 on: push
 
-env:
-  ZEEK_LTS: -lts
-  ZEEK_VERSION: 6.0.2-0
-
 jobs:
-  test_ubuntu_latest:
+  tests_ubuntu_22:
     runs-on: ubuntu-22.04
 
+    strategy:
+      matrix:
+        zeek: [{version: 6.0.2-0, tag: -lts}]
+
+    env:
+      ZEEK_VERSION: ${{ matrix.zeek.version }}
+      ZEEK_TAG: ${{ matrix.zeek.tag }}
+
     steps:
       - name: Prepare
         run: |
@@ -19,8 +23,8 @@ jobs:
 
       - name: Install Zeek
         run: |
-          (cd /tmp && curl -L -O https://download.opensuse.org/repositories/security:/zeek/xUbuntu_22.04/amd64/zeek${ZEEK_LTS}_${ZEEK_VERSION}_amd64.deb)
-          sudo apt install -y /tmp/zeek${ZEEK_LTS}-core_${ZEEK_VERSION}_amd64.deb
+          (cd /tmp && curl -L -O https://download.zeek.org/binary-packages/xUbuntu_22.04/amd64/zeek${ZEEK_TAG}-core_${ZEEK_VERSION}_amd64.deb)
+          sudo apt install -y /tmp/zeek${ZEEK_TAG}-core_${ZEEK_VERSION}_amd64.deb
           echo "/opt/zeek/bin:$PATH" >> $GITHUB_PATH
 
       - name: Checkout repository