[petsc-users] reset release branch

[Satish Balay via petsc-users]

All,

I had to force fix the release branch due to a bad merge.

If you've pulled on the release branch after the bad merge (before this fix) - 
and now have the commit 25cac2be9df307cc6f0df502d8399122c3a2b6a3 in it - i.e 
check with:

git branch --contains 25cac2be9df307cc6f0df502d8399122c3a2b6a3

please do:

git checkout master
git branch -D release
git fetch -p
git checkout release

[Note: As the petsc-3.14 release announcement e-mail indicated - we switched 
from using 'maint' branch to 'release' branch or release fixes]

Satish