ci: update to macos-11

Signed-off-by: Roman Volosatovs <[email protected]>

Author: rvolosatovs

.github/workflows/host_core.yml

@@ -15,7 +15,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-20.04, windows-2019, macos-10.15]
+        os: [ubuntu-20.04, windows-2019, macos-11]
         elixir: [1.14.3]
         otp: [25]
 

.github/workflows/wasmcloud_host.yml

@@ -14,7 +14,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-20.04, windows-2019, macos-10.15]
+        os: [ubuntu-20.04, windows-2019, macos-11]
         elixir: [1.14.3]
         otp: [25]