.github/workflows: update to Go 1.23, drop Go 1.21

Author: tklauser

.github/workflows/test.yml

@@ -4,7 +4,7 @@ jobs:
   test:
     strategy:
       matrix:
-        go-version: [1.21.x, 1.22.x]
+        go-version: [1.22.x, 1.23.x]
         os: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.os }}
     steps:
@@ -17,7 +17,7 @@ jobs:
 
     # Static checks from this point forward. Only run on one Go version and on
     # Linux, since it's the fastest platform, and the tools behave the same.
-    - if: matrix.os == 'ubuntu-latest' && matrix.go-version == '1.22.x'
+    - if: matrix.os == 'ubuntu-latest' && matrix.go-version == '1.23.x'
       run: diff <(echo -n) <(gofmt -s -d .)
-    - if: matrix.os == 'ubuntu-latest' && matrix.go-version == '1.22.x'
+    - if: matrix.os == 'ubuntu-latest' && matrix.go-version == '1.23.x'
       run: go vet ./...