Mark CBMC version 5.47.0

[thomasspriggs]

• 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).
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[codecov]

Codecov Report

Merging #6534 (f867b41) into develop (8834dc5) will increase coverage by 0.00%.
The diff coverage is 93.61%.

@@           Coverage Diff            @@
##           develop    #6534   +/-   ##
========================================
  Coverage    75.98%   75.98%           
========================================
  Files         1578     1578           
  Lines       180919   180938   +19     
========================================
+ Hits        137476   137494   +18     
- Misses       43443    43444    +1     

Impacted Files	Coverage Δ
src/analyses/goto_check_c.cpp	90.29% <92.30%> (-0.10%)	⬇️
src/goto-programs/goto_convert.cpp	92.03% <100.00%> (+0.07%)	⬆️
src/solvers/smt2/smt2_dec.cpp	76.52% <0.00%> (+0.86%)	⬆️

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