Update stable version in repo from 2.5.9 to 2.5.11

[GermanBluefox]

Think about update stable version to 2.5.11

Version: stable=2.5.9 (287 days old) => latest=2.5.11 (25 days old)
Installs: stable=8374 (68.54%), latest=617 (5.05%), total=12217

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Do not close this issue manually as a new issue will be created if condition for update still exists.

Please drop a comment if any reason exists which blocks updating to version 2.5.11 at this time.

Note: This is an automatically generated message and not personally authored by bluefox!
@mcm1957 for evidence