Get rid of debugging find, in favor of debugging ls.

.github/workflows/ghpages.yml

@@ -25,8 +25,7 @@ jobs:
        sudo apt-get install --assume-yes --quiet \
          --no-install-suggests --no-install-recommends \
          perl
-       echo "Where's Waldo?"
-       find / -name '*perl*' -print
+       ls -l /usr/bin/perl
 
     - name: "Checkout"
       uses: actions/checkout@v2