add L1Vector.h to the list of installed headers

Bugfix: L1Vector.h was not installed to include/ directory with "make install". Fixes the redmine issue https://lxcbmredmine01.gsi.de/issues/2293

added BugFix label

added 24 commits

• 258f101a...43c581ba - 23 commits from branch computing:master
• 67af108d - add L1Vector.h to the list of installed headers

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enabled an automatic merge when the pipeline for 67af108d succeeds

Dear @se.gorbunov, @v.akishina,

you have been identified as code owner of at least one file which was changed with this merge request.

Please check the changes and approve them or request changes.

added CodeOwners label

merged