Pin coturn, Dendrite and gitolite to the versions running.

coturn 4.18.0, Dendrite v0.15.2 and gitolite v3.6.15 (same digest as
latest) instead of floating :latest tags with imagePullPolicy Always.
The Dendrite manifest also catches up with the live memory limit.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Change-Id: I2e60f8aff4d6dc50cd12d2fc50c1553aa99bb71f
diff --git a/git/git.yaml b/git/git.yaml
index e9f83b4..1634796 100644
--- a/git/git.yaml
+++ b/git/git.yaml
@@ -47,8 +47,8 @@
               subPath: cgitrc
               readOnly: true
         - name: gitolite
-          image: docker.io/elsdoerfer/gitolite:latest
-          imagePullPolicy: Always
+          image: docker.io/elsdoerfer/gitolite:v3.6.15-ubuntu-26.04-20260824.3
+          imagePullPolicy: IfNotPresent
           env: []
           #tty: true
           #stdin: true