various: Consistently switch Java to v11

The latest Jenkins releases support only Java 11 (on the server side, and
thus on the build agent side, as the versions should match).

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: I29fb695171e96dff5dc61d94bdebc0588a2bf577
diff --git a/jammy-amd64-tf-a-build/Dockerfile b/jammy-amd64-tf-a-build/Dockerfile
index 70837a0..03d5028 100644
--- a/jammy-amd64-tf-a-build/Dockerfile
+++ b/jammy-amd64-tf-a-build/Dockerfile
@@ -33,7 +33,7 @@
     libxml-libxml-perl \
     lld \
     locales \
-    openjdk-8-jdk \
+    openjdk-11-jre-headless \
     openssh-server \
     perl \
     python3 \