Update tools/dep_updaters/update-test426-fixtures.sh

Co-authored-by: Antoine du Hamel <[email protected]>

Author: Trott

tools/dep_updaters/update-test426-fixtures.sh

@@ -20,10 +20,8 @@ rm -rf "$TARGET_DIR"
 mkdir "$TARGET_DIR"
 curl -f "$TARBALL_URL" | tar -xz --strip-components 1 -C "$TARGET_DIR"
 
-rm -rf "$TMP_DIR"
-
 TMP_FILE=$(mktemp)
-sed "s#https://github.com/tc39/source-map-tests/commit/[0-9a-f]*#https://github.com/tc39/source-map-tests/commit/$SHA#" "$README" > "$TMP_FILE"
+sed "s/$CURRENT_SHA/$SHA/" "$README" > "$TMP_FILE"
 mv "$TMP_FILE" "$README"
 
 # The last line of the script should always print the new version,