Merge pull request #5170 from cyphar/ci-conmon-libpathrs

gha: install libpathrs for conmon test as well

Author: rata

.github/workflows/validate.yml

@@ -281,6 +281,9 @@ jobs:
       run: |
         sudo apt update
         sudo apt -y install libseccomp-dev libglib2.0-dev libsystemd-dev socat
+    - name: install libpathrs ${{ env.LIBPATHRS_VERSION }}
+      run: |
+        sudo -E PATH="$PATH" ./script/build-libpathrs.sh "$LIBPATHRS_VERSION" /usr
 
     - name: install Go
       uses: actions/setup-go@v6