[sphinx] generate intersphinx mapping with matching version numbers

[marscher]

Changes

• fixes 404 error for xarray intersphinx mapping
• obtain version numbers and urls dynamically for intersphinx mapping

Related Issues

Closes # (add issue numbers)

Checks

• [x] updated doc/

[github-actions[bot]]

Test Results

2 185 tests  ±0   2 184 :heavy_check_mark: ±0   2m 37s :stopwatch: -1s        1 suites ±0          1 :zzz: ±0         1 files   ±0          0 :x: ±0 

Results for commit 04677240. ± Comparison against base commit 3eb7d359.

:recycle: This comment has been updated with latest results.

[codecov[bot]]

Codecov Report

Merging #815 (0467724) into master (3eb7d35) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #815   +/-   ##
=======================================
  Coverage   96.80%   96.80%           
=======================================
  Files          81       81           
  Lines        5380     5380           
=======================================
  Hits         5208     5208           
  Misses        172      172           

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[marscher]

The error on RTD about duplicated labels for get_groove is unrelated to the changes made.

[marscher]

The warnings on RTD are due to caching, therefore unrelated.

[CagtayFabry]

cool, let's hope this fixes the issue once and for all 👍 🤖