chore: bump version to 12.2

[ZNeumann]

No description provided.

[newrelic-php-agent-bot]

Test Suite	Status	Result
Multiverse	✅	16/16 passing
SOAK	❌	84/85 passing

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.15%. Comparing base (1e5fa6d) to head (437fddc).

Additional details and impacted files

@@           Coverage Diff           @@
##              dev    #1121   +/-   ##
=======================================
  Coverage   78.15%   78.15%           
=======================================
  Files         193      193           
  Lines       28053    28053           
=======================================
  Hits        21925    21925           
  Misses       6128     6128           

Flag	Coverage Δ
agent-for-php-7.2	78.40% <ø> (ø)
agent-for-php-7.3	78.42% <ø> (ø)
agent-for-php-7.4	78.28% <ø> (ø)
agent-for-php-8.0	77.48% <ø> (ø)
agent-for-php-8.1	77.79% <ø> (ø)
agent-for-php-8.2	77.41% <ø> (ø)
agent-for-php-8.3	77.41% <ø> (ø)
agent-for-php-8.4	77.43% <ø> (ø)

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