Update scale-info requirement to 2.3

[ascjones]

Follow up to #1357 which uses some 2.3 features so now this is the minimum required version.

[codecov-commenter]

Codecov Report

Merging #1467 (1d6fbaf) into master (eeb00ed) will increase coverage by 25.22%.
The diff coverage is 0.00%.

❗ Current head 1d6fbaf differs from pull request most recent head 5d3df35. Consider uploading reports for the commit 5d3df35 to get more accurate results

@@             Coverage Diff             @@
##           master    #1467       +/-   ##
===========================================
+ Coverage   45.82%   71.04%   +25.22%     
===========================================
  Files         201      201               
  Lines        6187     6189        +2     
===========================================
+ Hits         2835     4397     +1562     
+ Misses       3352     1792     -1560     

Impacted Files	Coverage Δ
crates/e2e/src/utils.rs	0.00% <0.00%> (ø)
crates/storage/src/lazy/mapping.rs	71.42% <ø> (ø)
crates/allocator/src/bump.rs	85.12% <0.00%> (-2.28%)	⬇️
crates/metadata/src/layout/mod.rs	76.42% <0.00%> (-1.63%)	⬇️
crates/ink/ir/src/ir/attrs.rs	82.27% <0.00%> (+3.87%)	⬆️
crates/ink/ir/src/ir/trait_def/item/mod.rs	88.52% <0.00%> (+4.91%)	⬆️
crates/env/src/engine/off_chain/test_api.rs	64.70% <0.00%> (+5.88%)	⬆️
crates/ink/ir/src/ir/item_impl/constructor.rs	91.80% <0.00%> (+8.19%)	⬆️
crates/engine/src/ext.rs	66.27% <0.00%> (+8.28%)	⬆️
crates/ink/ir/src/ir/idents_lint.rs	71.42% <0.00%> (+9.52%)	⬆️
... and 51 more

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more