Update brew.sh: hide printf's stderr in numeric()

Avoid #6721 and similar confusing messages during version comparison by hiding printf's stderr (printf woks anyway).

Library/Homebrew/brew.sh

@@ -61,7 +61,7 @@ git() {
 numeric() {
   # Condense the exploded argument into a single return value.
   # shellcheck disable=SC2086,SC2183
-  printf "%01d%02d%02d%03d" ${1//[.rc]/ }
+  printf "%01d%02d%02d%03d" ${1//[.rc]/ } 2>/dev/null
 }
 
 HOMEBREW_VERSION="$(git -C "$HOMEBREW_REPOSITORY" describe --tags --dirty --abbrev=7 2>/dev/null)"