Bump pyang from 2.5.2 to 2.6.0

[dependabot]

Bumps pyang from 2.5.2 to 2.6.0.

Changelog

Sourced from pyang's changelog.

• 2.6.0 - 2023-11-03

       lots of improvements to the UML plugin
         thanks to Nick Hancock
       lots of improvements to build and test
         thanks to @ubaumann
       fix invalid regular expression on Windows
         thanks to Jan Kundrát
       fix script issues on Windows
         thanks to Jan Kundrát
       fix validation of when expressions for 1.1 modules
         thanks to Derek Ingrouville
       fixes for revision-date in depend output
         thanks to Slavomir Mazur
   [#845](https://github.com/mbj4668/pyang/issues/845) - sid item status
   [#844](https://github.com/mbj4668/pyang/issues/844) - tree max line length issue
   [#837](https://github.com/mbj4668/pyang/issues/837) - test fixes
   [#821](https://github.com/mbj4668/pyang/issues/821) - typo in jstree output
   [#818](https://github.com/mbj4668/pyang/issues/818) - issue with decimal64 defaults in json2xml
   [#809](https://github.com/mbj4668/pyang/issues/809) - revision-date parsed wrong if multiple "@" found in path
          thanks to Michael Littlejohn
   [#729](https://github.com/mbj4668/pyang/issues/729) - handle name scoping of 1.1 submodules in XPath expressions
   [#516](https://github.com/mbj4668/pyang/issues/516) - crash in tree output

• 2.5.3 - 2022-03-30

       added support for checking 'ancestor' and 'ancestor-or-self' XPATH axes
       added new option --exclude-features which is used to prune the
         data model by removing all nodes that are defined with the
         corresponding "if-feature"
       added --check-update-include-structures to apply the upgrade
         checks also to sx:structures.
       changed the error level of all CHK* errors so that they can be
         changed into warnings
       allow refinement of description/reference in action/notification
       disable writing of Yacc parse tables to files
         thanks to Robert Andersson
       fix error locating /usr/share/yang with pip 21.3.1
         thanks to cygnus2048
   [#802](https://github.com/mbj4668/pyang/issues/802) - fixed crash when using transforms and the module imports
            submodules
   [#797](https://github.com/mbj4668/pyang/issues/797) - as per RFC 8340, added : to grouping header
   [#784](https://github.com/mbj4668/pyang/issues/784) - corrupt files could lead to pyang crash
   [#778](https://github.com/mbj4668/pyang/issues/778) - check deref target
   [#777](https://github.com/mbj4668/pyang/issues/777) - check path after deref
   [#775](https://github.com/mbj4668/pyang/issues/775) - correct multi-line argument wrapping when generating YANG

Commits

• 987f59c Updates for 2.6.0 release
• dc97553 Fixes #729, see #193, #836 - handle 1.1 scoping rules in XPath evaluations
• 4ba83e7 Fixes #650 - bad expansion of multiple related augments
• 1b1c3e0 fixed markdown
• c5d89e3 added missing markdown files
• 9bc3d4b converted man pages from docbook to markdown; use pandoc to create nroff
• ecf1bf1 Move emit_child_stmt() out of emit_notify()
• 54c3916 Fix missing notifications defined in interior data nodes
• d5bbef9 Fix issues with the rendering of identities, identityrefs, typedefs and leafrefs
• f58d635 Minor correction to a comment
• Additional commits viewable in compare view

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