fix: bump go

Author: christianwoehrle

.github/workflows/coverage.yml

@@ -12,7 +12,7 @@ jobs:
       - name: setup-go
         uses: actions/setup-go@v3
         with:
-          go-version: '1.19'
+          go-version: '1.21'
       - name: Run tests
         run: | 
           make test

.github/workflows/e2e.yml

@@ -8,7 +8,7 @@ jobs:
     - name: Set up Go 1.x
       uses: actions/setup-go@v3
       with:
-        go-version: 1.19
+        go-version: 1.21
       id: go
     - name: checkout project
       uses: actions/checkout@v3

.github/workflows/go.yml

@@ -8,7 +8,7 @@ jobs:
     - name: Set up Go 1.x
       uses: actions/setup-go@v3
       with:
-        go-version: 1.19
+        go-version: 1.21
       id: go
     - name: Check out code into the Go module directory
       uses: actions/checkout@v3