Following the cert-manager migration to FluxCD, it was upversioned to
v1.7.1 from v0.41.2, which means we need to update our helm-chart
docs to use v1 instead of v1alpha2.
Closes-Bug: #1978858
Signed-off-by: Pedro Almeida <pedro.monteiroazevedodemouraalmeida@windriver.com>
Change-Id: I79955ed7412c0961b315f3b8a8cabd9dfce88fbf