Fix compile.yml.

Author: Jannyboy11

.github/workflows/compile.yml

@@ -40,7 +40,7 @@ jobs:
           distribution: 'microsoft'
           java-version: '21'
           cache: 'maven'
-      - name: Install CraftBukkit 1.20.6, 1.21, 1.21, 1.21.3
+      - name: Install CraftBukkit 1.20.6, 1.21, 1.21, 1.21.3, 1.21.4
         # Use build number 4287 to compile CraftBukkit 1.21, see:
         # https://hub.spigotmc.org/jira/browse/BUILDTOOLS-658
         # https://hub.spigotmc.org/versions/