Temporarily pin aeppl to 0.0.15

[ricardoV94]

Until #5191/aesara-devs/aeppl#92 is sorted out

[codecov]

Codecov Report

Merging #5194 (d6d0195) into main (196fb9d) will increase coverage by 36.11%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##             main    #5194       +/-   ##
===========================================
+ Coverage   41.98%   78.09%   +36.11%     
===========================================
  Files          88       88               
  Lines       14159    14159               
===========================================
+ Hits         5945    11058     +5113     
+ Misses       8214     3101     -5113     

Impacted Files	Coverage Δ
pymc/variational/opvi.py	30.29% <0.00%> (+0.48%)	⬆️
pymc/variational/approximations.py	30.06% <0.00%> (+0.65%)	⬆️
pymc/initial_point.py	100.00% <0.00%> (+1.81%)	⬆️
pymc/step_methods/step_sizes.py	100.00% <0.00%> (+2.08%)	⬆️
pymc/distributions/distribution.py	94.50% <0.00%> (+3.84%)	⬆️
pymc/step_methods/hmc/integration.py	82.69% <0.00%> (+3.84%)	⬆️
pymc/step_methods/hmc/nuts.py	95.62% <0.00%> (+4.37%)	⬆️
pymc/step_methods/hmc/base_hmc.py	91.12% <0.00%> (+7.25%)	⬆️
pymc/variational/inference.py	29.37% <0.00%> (+7.90%)	⬆️
pymc/blocking.py	95.12% <0.00%> (+9.75%)	⬆️
... and 52 more