modbus.rst: remove irrelevant colons

According to the current state of the docs, we do not use colons for the name of subsections, so this MR deletes them in modbus.rst

Signed-off-by: Grzegorz Gwozdz grzegorz.gwozdz@huawei.com

changed title from modbus.rst: remove irrelevant modbus to modbus.rst: remove irrelevant colons

approved this merge request

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• 87a54257 - modbus.rst: remove irrelevant colons

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requested review from @aszpilko

requested review from @stefanschmidt

approved this merge request

started a merge train

mentioned in commit 73121cde

merged