Update version to v1.17.18

[willhickey]

Nothing in this commit except the version bump:

$ glol -1
e87f8b5c22 2024-01-20 21:12:02 -0600  (HEAD -> version_bump_v1.17.18, origin/version_bump_v1.17.18)  will.hickey@solana.com Update version to v1.17.18
$ git diff v1.17..HEAD | grep -vE "^ |^@@ |^--- |^\+\+\+ |^index |^diff |^-( \")?solana.*1.17.17|^\+( \")?solana.*1.17.18|^-version|^\+version"
$

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (27a4380) 81.7% compared to head (e87f8b5) 81.7%.
Report is 1 commits behind head on v1.17.

Additional details and impacted files

@@           Coverage Diff           @@
##            v1.17   #34866   +/-   ##
=======================================
  Coverage    81.7%    81.7%           
=======================================
  Files         806      806           
  Lines      218920   218925    +5     
=======================================
+ Hits       178884   178894   +10     
+ Misses      40036    40031    -5