chore: upgrade Go to 1.20.10

https://groups.google.com/g/golang-announce/c/iNNxDTCjZvo/m/UDd7VKQuAAAJ?utm_medium=email&utm_source=footer

.github/actions/setup-go/action.yaml

@@ -4,7 +4,7 @@ description: |
 inputs:
   version:
     description: "The Go version to use."
-    default: "1.20.8"
+    default: "1.20.10"
 runs:
   using: "composite"
   steps:

.github/workflows/ci.yaml

@@ -220,7 +220,7 @@ jobs:
         with:
           # This doesn't need caching. It's super fast anyways!
           cache: false
-          go-version: 1.20.8
+          go-version: 1.20.10
 
       - name: Install shfmt
         run: go install mvdan.cc/sh/v3/cmd/shfmt@v3.5.0