Spark: Update Antlr in Spark 3.2 extensions to 4.8 (#5208)

This will match the Antlr version in Spart 3.2.
diff --git a/spark/v3.2/build.gradle b/spark/v3.2/build.gradle
index 85646e5..45243ce 100644
--- a/spark/v3.2/build.gradle
+++ b/spark/v3.2/build.gradle
@@ -154,8 +154,8 @@
 
     // Required because we remove antlr plugin dependencies from the compile configuration, see note above
     // We shade this in Spark3 Runtime to avoid issues with Spark's Antlr Runtime
-    runtimeOnly "org.antlr:antlr4-runtime:4.7.1"
-    antlr "org.antlr:antlr4:4.7.1"
+    runtimeOnly "org.antlr:antlr4-runtime:4.8"
+    antlr "org.antlr:antlr4:4.8"
   }
 
   generateGrammarSource {