fix(core): bump stellar-sdk

[OttoAllmendinger]

Should fix flaky build: stellar/js-stellar-sdk#645

Issue: BG-34800

[codecov]

Codecov Report

Merging #1368 (200bc3f) into master (6b9dccb) will increase coverage by 59.44%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master    #1368       +/-   ##
===========================================
+ Coverage        0   59.44%   +59.44%     
===========================================
  Files           0      111      +111     
  Lines           0    10486    +10486     
  Branches        0     2054     +2054     
===========================================
+ Hits            0     6233     +6233     
- Misses          0     3437     +3437     
- Partials        0      816      +816     

Flag	Coverage Δ
unit	59.44% <ø> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
modules/core/src/v2/coins/index.ts	100.00% <0.00%> (ø)
modules/core/src/v2/coins/erc20Token.ts	30.00% <0.00%> (ø)
modules/core/src/v2/pendingApproval.ts	48.20% <0.00%> (ø)
modules/core/src/v2/coins/celoToken.ts	85.29% <0.00%> (ø)
modules/core/src/v2/coins/teos.ts	92.85% <0.00%> (ø)
modules/core/src/v2/recovery/blockchairApi.ts	74.35% <0.00%> (ø)
modules/core/src/v2/coins/tbcha.ts	84.61% <0.00%> (ø)
modules/core/src/keychains.ts	31.96% <0.00%> (ø)
modules/core/src/v2/coins/bch.ts	83.56% <0.00%> (ø)
modules/core/src/v2/coins/tzec.ts	87.50% <0.00%> (ø)
... and 101 more