Docs: Update for `global_ordinal()` and `world_size()`#1

rittik9 wants to merge 1 commit intoAlexandrByzov:bugfix/20852_add-support-for-xla2.7-which-deprecated-methodsAlexandrByzov/pytorch-lightning:bugfix/20852_add-support-for-xla2.7-which-deprecated-methodsfrom

rittik9:patch-2rittik9/pytorch-lightning:patch-2Copy head branch name to clipboard