tf-a-tftf-docs-watcher: Update to Jammy image

Following tf-a-docs-watcher updated earlier.

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: I9a668934a78f9b87b0931e2eba2eb475eef2825e
diff --git a/tf-a-tftf-docs-watcher.yaml b/tf-a-tftf-docs-watcher.yaml
index 17eb683..fce874d 100644
--- a/tf-a-tftf-docs-watcher.yaml
+++ b/tf-a-tftf-docs-watcher.yaml
@@ -1,6 +1,6 @@
 - job:
     name: tf-a-tftf-docs-watcher
-    node: docker-amd64-tf-a-bionic
+    node: docker-amd64-tf-a-jammy
     project-type: freestyle
     concurrent: false
     description: