Add llvm-ir2vec.rst to pr-subscribes-mlgo (#149412)

diff --git a/.github/new-prs-labeler.yml b/.github/new-prs-labeler.yml
index d4cf869..7905f762 100644
--- a/.github/new-prs-labeler.yml
+++ b/.github/new-prs-labeler.yml
@@ -718,6 +718,7 @@
   - llvm/lib/Analysis/models/**
   - llvm/test/Analysis/IR2Vec/**
   - llvm/tools/llvm-ir2vec/**
+  - llvm/docs/CommandGuide/llvm-ir2vec.rst
 
 tools:llvm-exegesis:
   - llvm/tools/llvm-exegesis/**