fix: Update docusaurus.config.js

[hughhhh]

SUMMARY

Update path to reference apache/superset/docs instead of apache/superset/docs-v2

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
  • Migration is atomic, supports rollback & is backwards-compatible
  • Confirm DB migration upgrade and downgrade tested
  • Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API

[codecov]

Codecov Report

Merging #18577 (4e1c661) into master (f3c393f) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master   #18577   +/-   ##
=======================================
  Coverage   66.29%   66.29%           
=======================================
  Files        1594     1594           
  Lines       62623    62623           
  Branches     6312     6312           
=======================================
  Hits        41518    41518           
  Misses      19456    19456           
  Partials     1649     1649           

Flag	Coverage Δ
hive	52.13% <ø> (ø)
javascript	51.34% <ø> (ø)
mysql	81.25% <ø> (ø)
postgres	81.29% <ø> (ø)
presto	51.97% <ø> (ø)
python	81.73% <ø> (ø)
sqlite	80.99% <ø> (ø)

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