Merge pull request #2447 from asumagic/readthedocs-fix-attempt-v

Yet another fix attempt for the rtd requirements

docs/readthedocs-requirements.txt

@@ -2,7 +2,8 @@
 # this file merges both the usual and the docs requirements so that everything
 # gets installed correctly.
 
+--find-links https://k2-fsa.github.io/k2/cpu.html
 -r ../requirements.txt
 -r docs-requirements.txt
-k2-1.24.4.dev20240223+cpu.torch2.2.1 -f https://k2-fsa.github.io/k2/cpu.html
+k2==1.24.4.dev20240223+cpu.torch2.2.1
 torch==2.2.1