patch 8.2.3022: available encryption methods are not strong enough

Problem:    Available encryption methods are not strong enough.
Solution:   Add initial support for xchaha20. (Christian Brabandt,
            closes #8394)
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9127455..e569b42 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -71,7 +71,8 @@
             cscope \
             libgtk2.0-dev \
             desktop-file-utils \
-            libtool-bin
+            libtool-bin \
+            libsodium-dev
 
       - name: Install clang-11
         if: matrix.compiler == 'clang'