Mark hotfix cbmc version 5.22.1

[NlightNFotis]

This hotfix version is concerning a change in our CI scripts that caused releases to be misnamed (5.22.0 instead of cbmc-5.22.0). This is important because some of our release scripts are being based on the name of the release having a particular form.

• Each commit message has a non-empty body, explaining why the change was made.
• Methods or procedures I have added are documented, following the guidelines provided in CODING_STANDARD.md.
• The feature or user visible behaviour I have added or modified has been documented in the User Guide in doc/cprover-manual/
• Regression or unit tests are included, or existing tests cover the modified code (in this case I have detailed which ones those are in the commit message).
• My commit message includes data points confirming performance improvements (if claimed).
• My PR is restricted to a single feature or bugfix.
• White-space or formatting changes outside the feature-related changed lines are in commits of their own.

[codecov]

Codecov Report

Merging #5777 (70f6bf0) into develop (ec21533) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop    #5777   +/-   ##
========================================
  Coverage    69.68%   69.68%           
========================================
  Files         1248     1248           
  Lines       100855   100855           
========================================
  Hits         70278    70278           
  Misses       30577    30577           

Flag	Coverage Δ
cproversmt2	43.43% <ø> (ø)
regression	66.66% <ø> (ø)
unit	32.20% <ø> (ø)

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