hack(ci): run lean make twice (#7192)

At the moment running `lean --make src` after `leanproject up` will recompile some files.  Merging this PR should have the effect of uploading these newly compiled olean files.

This also makes github actions call `lean --make src` twice to prevent this problem from happening in the first place.

.github/workflows/build.yml

@@ -83,6 +83,7 @@ jobs:
           leanpkg configure
           echo "::set-output name=started::true"
           lean --json -T100000 --make src | python scripts/detect_errors.py
+          lean --json -T100000 --make src | python scripts/detect_errors.py
 
       - name: push release to azure
         if: always() && github.repository == 'leanprover-community/mathlib' && steps.build.outputs.started == 'true'

README.md

@@ -6,7 +6,8 @@
 [![Gitpod Ready-to-Code](https://img.shields.io/badge/Gitpod-ready--to--code-blue?logo=gitpod)](https://gitpod.io/#https://github.com/leanprover-community/mathlib)
 
 [Mathlib](https://leanprover-community.github.io) is a user maintained library for the [Lean theorem prover](https://leanprover.github.io).
-It contains both programming infrastructure and mathematics, as well as tactics that use the former and allow to develop the latter.
+It contains both programming infrastructure and mathematics,
+as well as tactics that use the former and allow to develop the latter.
 
 ## Installation