Bump version to v1.17.6

[yihau]

Problem

the bumping version action failed: https://github.com/solana-labs/solana/actions/runs/6829840095

Summary of Changes

have this bumping version PR first and will investigate it later

[codecov]

Codecov Report

Merging #34025 (4d7efc6) into v1.17 (7089f1e) will decrease coverage by 0.1%.
Report is 1 commits behind head on v1.17.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            v1.17   #34025     +/-   ##
=========================================
- Coverage    81.8%    81.8%   -0.1%     
=========================================
  Files         803      803             
  Lines      217916   217916             
=========================================
- Hits       178361   178355      -6     
- Misses      39555    39561      +6     

[willhickey]

Thanks!

The bumping version action fails because it doesn't have permission to create the feature branch. There's a way to grant it permission to create a branch but only with the API, not with the UI. I'll try to figure it out this week. If that doesn't work I can set it up to use my fork to create the feature branch. That would be a little brittle, but easy to switch to some other fork if need be.