ci: add dependencies.yml to actions/cache key

This should have been in df549ed, I missed it at the time.

Author: flavorjones

.github/workflows/sqlite3-ruby.yml

@@ -53,7 +53,7 @@ jobs:
         uses: actions/cache@v3
         with:
           path: ports
-          key: ports-${{matrix.os}}-${{hashFiles('ext/sqlite3/extconf.rb')}}
+          key: ports-${{matrix.os}}-${{hashFiles('ext/sqlite3/extconf.rb','dependencies.yml')}}
 
       - run: bundle exec rake compile -- --disable-system-libraries
         if: matrix.lib == 'packaged'