Merge pull request #6543 from herberteuler/master

primop_match: fix example letter case in document

src/libexpr/primops.cc

@@ -3529,7 +3529,7 @@ static RegisterPrimOp primop_match({
       builtins.match "[[:space:]]+([[:upper:]]+)[[:space:]]+" "  FOO   "
       ```
 
-      Evaluates to `[ "foo" ]`.
+      Evaluates to `[ "FOO" ]`.
     )s",
     .fun = prim_match,
 });