bump GB and set GB burn

[robert-zaremba]

Description

• bumps GB version
• set Burn mechanism to true

[codecov]

Codecov Report

Merging #2071 (bc1335f) into main (7f05ad4) will decrease coverage by 4.81%.
The diff coverage is 60.07%.

@@            Coverage Diff             @@
##             main    #2071      +/-   ##
==========================================
- Coverage   75.38%   70.58%   -4.81%     
==========================================
  Files         100      126      +26     
  Lines        8025     9580    +1555     
==========================================
+ Hits         6050     6762     +712     
- Misses       1589     2352     +763     
- Partials      386      466      +80     

Impacted Files	Coverage Δ
ante/spam_prevention.go	75.92% <ø> (ø)
util/store/unmarshal.go	0.00% <0.00%> (ø)
x/incentive/codec.go	47.82% <ø> (+9.89%)	⬆️
x/incentive/keeper/hooks.go	0.00% <0.00%> (ø)
x/incentive/keeper/invariants.go	0.00% <0.00%> (ø)
x/incentive/keeper/keeper.go	64.28% <ø> (ø)
x/leverage/keeper/borrows.go	78.57% <ø> (ø)
x/leverage/keeper/errors.go	100.00% <ø> (ø)
x/leverage/keeper/exchange_rate.go	72.72% <ø> (ø)
x/leverage/keeper/genesis.go	87.23% <ø> (ø)
... and 80 more

... and 13 files with indirect coverage changes

[facundomedica]

LGTM, but app.go change is not necessary