Update migrating_owncloud.rst - oC 10.16

[AndyScherzinger]

change to oC 10.16

[AndyScherzinger]

backports matching #11225

[AndyScherzinger]

/backport to stable32

[szaimen]

Lets discuss this first: nextcloud/server#56791

[szaimen]

/backport to stable31

[AndyScherzinger]

/backport to stable25

[backportbot]

The backport to stable25 failed. Please do this backport manually.

# Switch to the target branch and update it
git checkout stable25
git pull origin stable25

# Create the new backport branch
git checkout -b backport/13910/stable25

# Cherry pick the change from the commit sha1 of the change against the default branch
# This might cause conflicts, resolve them
git cherry-pick 1413c839

# Push the cherry pick commit to the remote repository and open a pull request
git push origin backport/13910/stable25

Error: Failed to check for changes with origin/stable25: No changes found in backport branch

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Learn more about backports at https://docs.nextcloud.com/server/stable/go.php?to=developer-backports.