test TF 2.7.0rc1

Author: t-kalinowski

.github/workflows/R-CMD-check.yaml

@@ -46,8 +46,8 @@ jobs:
           - {os: 'ubuntu-20.04', tf: '2.1', r: 'release'}
 
           # these are allowed to fail
-          - {os: 'ubuntu-20.04', tf: 'default', r: 'devel'}
-          - {os: 'ubuntu-20.04', tf: '2.7.0rc0', r: 'release'}
+          # - {os: 'ubuntu-20.04', tf: 'default', r: 'devel'}
+          - {os: 'ubuntu-20.04', tf: '2.7.0rc1', r: 'release'}
           # - {os: 'ubuntu-20.04', tf: 'nightly' , r: 'release'}
 
     runs-on: ${{ matrix.os }}