Update version to v1.17.12

[willhickey]

Nothing in this commit except the version bump:

$ glol -1
e429c4a433 2023-12-15 21:19:32 -0600  (HEAD -> version_bump_v1.17.12, origin/version_bump_v1.17.12)  will.hickey@solana.com Update version to v1.17.12
$ git diff v1.17..HEAD | grep -vE "^ |^@@ |^--- |^\+\+\+ |^index |^diff |^-( \")?solana.*1.17.11|^\+( \")?solana.*1.17.12|^-version|^\+version"
$

[codecov]

Codecov Report

Merging #34492 (e429c4a) into v1.17 (ec87ec9) will decrease coverage by 0.1%.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff            @@
##            v1.17   #34492     +/-   ##
=========================================
- Coverage    81.8%    81.8%   -0.1%     
=========================================
  Files         803      803             
  Lines      218110   218110             
=========================================
- Hits       178469   178456     -13     
- Misses      39641    39654     +13