Upgrade to ghc-8.10.3

Author: newhoggy

.github/workflows/build.yml

@@ -14,7 +14,7 @@ jobs:
       fail-fast: false
       matrix:
         subset: [network, consensus]
-        ghc: ["8.6.5", "8.10.2"]
+        ghc: ["8.6.5", "8.10.3"]
         os: [ubuntu-latest, windows-latest]
         exclude:
           - os: windows-latest