podTemplate2: Pin to Buildah v1.37 for now

Buildah 1.38 and 1.39 have a bug that prevents them being able to build
containers in a Kubernetes pod.  Whenever I try, I get:

> error stat()ing intended root directory
> "/var/tmp/buildah3537271510/mnt/rootfs": no such file or directory

I have not identified the root cause yet, but reverting to 1.37 works
around the issue for now.

resources/podTemplate2.yaml

@@ -1,7 +1,7 @@
 spec:
   containers:
   - name: buildah
-    image: quay.io/containers/buildah:v1
+    image: quay.io/containers/buildah:v1.37
     command:
     - cat
     stdin: true