Update Guava reference in to version 31.

PiperOrigin-RevId: 413969930
diff --git a/scripts/bootstrap/compile.sh b/scripts/bootstrap/compile.sh
index 67c7210..2650c0b 100755
--- a/scripts/bootstrap/compile.sh
+++ b/scripts/bootstrap/compile.sh
@@ -29,7 +29,7 @@
 LIBRARY_JARS=$(find $ADDITIONAL_JARS third_party -name '*.jar' | grep -Fv JavaBuilder | grep -Fv third_party/guava/guava | grep -ve 'third_party/grpc/grpc.*jar' | grep -Fv third_party/netty_tcnative | tr "\n" " ")
 GRPC_JAVA_VERSION=1.41.0
 GRPC_LIBRARY_JARS=$(find third_party/grpc -name '*.jar' | grep -e ".*${GRPC_JAVA_VERSION}.*jar" | tr "\n" " ")
-GUAVA_VERSION=30.1.1
+GUAVA_VERSION=31.0.1
 GUAVA_JARS=$(find third_party/guava -name '*.jar' | grep -e ".*${GUAVA_VERSION}.*jar" | tr "\n" " ")
 LIBRARY_JARS="${LIBRARY_JARS} ${GRPC_LIBRARY_JARS} ${GUAVA_JARS}"