fix(deps): update rust crate octocrab to 0.50.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
octocrab	dependencies	minor	0.49.0 → 0.50.0

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Release Notes

XAMPPRocky/octocrab (octocrab)

v0.50.0

Compare Source

Added

• add create_comment to PullRequestHandler (#​880)
• Add support for exchanging oauth code for access token (#​780)
• add get_app (#​757)
• Add ability to update an existing label (#​786)
• Added converted_from_draft to Event (#​859)

Fixed

• Use PUT not PATCH for pull request reviews (#​879)
• cargo fmt, cargo test, Set MSRV to 1.85.0 (#​878)
• deser generate repo as respository (#​812)
• use new search model on search function
• revert commit back to correct structure

Other

• [breaking] remove the either dependency (#​883)
• added issue_field_added to Event enum (#​882)
• update MSRV to 1.95.0
• don't include unconditional backtrace in Display impl (#​824)
• add a simple test for compare commits
• remove duplicated GitUser
• create search models submodule
• move repository model from commits module
• move maybe_empty to models module
• remove Option<> for some fields of PullRequest (#​873)

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