Update to 3.8

Build against 3.8.0 and test against 3.8.3.

Change-Id: Idf84544f57edfea9d3b3277ebe890472383c3cc6
diff --git a/WORKSPACE b/WORKSPACE
index c5a30fc..24eb6c1 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "4b1d0d1c0ec0c27db25eaf111c7ea07aecb13742",
+    commit = "e977766e5670dca125c502c37339e9f3da9b329b",
 )
 
 load(
diff --git a/test/docker/gerrit/Dockerfile b/test/docker/gerrit/Dockerfile
index 0859d90..5eeb044 100755
--- a/test/docker/gerrit/Dockerfile
+++ b/test/docker/gerrit/Dockerfile
@@ -1,4 +1,4 @@
-FROM gerritcodereview/gerrit:3.7.6-ubuntu20
+FROM gerritcodereview/gerrit:3.8.3-ubuntu22
 
 ENV GERRIT_SITE /var/gerrit
 COPY artifacts/plugins/ $GERRIT_SITE/plugins/