doc: Fix wording in JIT README

Remove superfluous 'is' from sentence.

Author: Yugo Nagata 
Reviewed-by: Daniel Gustafsson 
Discussion: https://postgr.es/m/20250526154412.5f77dfead87af9afc089cc48@sraoss.co.jp

diff --git a/src/backend/jit/README b/src/backend/jit/README
index 5427bdf2153ff8c581e47e58ff6bcead1921595c..a40950dfb039eb457101221ca86fb3b654ef4569 100644 (file)
--- a/src/backend/jit/README
+++ b/src/backend/jit/README
@@ -205,7 +205,7 @@ The ability to do so allows us to get the LLVM IR for all operators
 bitcode files get installed into the server's
   $pkglibdir/bitcode/postgres/
 Using existing LLVM functionality (for parallel LTO compilation),
-additionally an index is over these is stored to
+additionally an index over these is stored to
 $pkglibdir/bitcode/postgres.index.bc
 
 Similarly extensions can install code into