Move to substrate.io

[nuke-web3]

• Fix all Substrate docs links to use https://docs.substrate.io/
  • Note: link to specific docs include v3 in the URL, for new versions of the docs we need to replace this manually
• minor edits for consistency

Upstream paritytech/substrate#10007

[codecov-commenter]

Codecov Report

Merging #957 (37d1975) into master (ff723b1) will increase coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #957      +/-   ##
==========================================
+ Coverage   82.92%   82.95%   +0.03%     
==========================================
  Files         190      190              
  Lines        8163     8163              
==========================================
+ Hits         6769     6772       +3     
+ Misses       1394     1391       -3     

Impacted Files	Coverage Δ
crates/lang/macro/src/lib.rs	100.00% <ø> (ø)
...ates/storage/src/collections/hashmap/fuzz_tests.rs	98.93% <0.00%> (+3.19%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update ff723b1...37d1975. Read the comment docs.

[cmichi]

Thank you, Dan!

The failing CI test is because of something different, we need to do a new release soon to resolve it.