[doc] fix scipy intersphinx mapping (again)

[marscher]

Changes

• The intersphinx mapping path for the released scipy version has changed again, so we adopt it here.
• Made asdf point to the used version.

Related Issues

Closes #764

Checks

• updated doc/

[codecov]

Codecov Report

Merging #765 (1349a5e) into master (3e307fc) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #765   +/-   ##
=======================================
  Coverage   96.83%   96.83%           
=======================================
  Files          88       88           
  Lines        6009     6009           
=======================================
  Hits         5819     5819           
  Misses        190      190           

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[github-actions]

Unit Test Results

       1 files  ±0         1 suites  ±0   2m 33s ⏱️ -7s
2 152 tests ±0  2 152 ✔️ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit 1349a5e. ± Comparison against base commit 3e307fc.

♻️ This comment has been updated with latest results.