ci: disable macos-11.0 runners for the moment

because they're broken. See this issue for details: actions/runner-images#2381

Author: tofi86

.github/workflows/release.yml

@@ -50,7 +50,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ macos-10.15, macos-11.0 ]
+        os: [ macos-10.15 ] # macos-11.0
 
     steps:
       - uses: actions/checkout@v2

.github/workflows/test.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ macos-10.15, macos-11.0 ]
+        os: [ macos-10.15 ] # macos-11.0
 
     steps:
     - uses: actions/checkout@v2
@@ -33,7 +33,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ macos-10.15, macos-11.0 ]
+        os: [ macos-10.15 ] # macos-11.0
 
     steps:
     - uses: actions/checkout@v2