[Python-checkins] Add windows build.bat counterpart for 'make regen-all' in error message (GH-26770)

[terryjreedy]

https://github.com/python/cpython/commit/a13edfb857793f0f92a4fef3919f215e008df5c5
commit: a13edfb857793f0f92a4fef3919f215e008df5c5
branch: 3.9
author: Miss Islington (bot) <31488909+miss-islington at users.noreply.github.com>
committer: terryjreedy <tjreedy at udel.edu>
date: 2021-07-26T23:32:45-04:00
summary:

Add windows build.bat counterpart for 'make regen-all' in error message (GH-26770)

(cherry picked from commit d61b69f02d441ae517109a4428f2a18416c9ff0f)

Co-authored-by: Ken Jin <28750310+Fidget-Spinner at users.noreply.github.com>

files:
M .github/workflows/build.yml

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index a4c5a396fa496e..a4efb42f5aa064 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -93,7 +93,7 @@ jobs:
           # Check for changes in regenerated files
           if ! test -z "$changes"
           then
-            echo "Generated files not up to date. Perhaps you forgot to run make regen-all ;)"
+            echo "Generated files not up to date. Perhaps you forgot to run make regen-all or build.bat --regen ;)"
             echo "$changes"
             exit 1
           fi