chore: get go version from go.mod

This avoids needing to update the go version in multiple places.

Author: justinsb

.github/workflows/main.yml

@@ -14,8 +14,7 @@ jobs:
       - name: Set up go
         uses: actions/setup-go@v5
         with:
-          go-version: '1.22'
-          stable: true
+          go-version-file: 'go.mod'
 
       - uses: actions/checkout@v2
 
@@ -29,8 +28,7 @@ jobs:
       - name: Set up go
         uses: actions/setup-go@v5
         with:
-          go-version: '1.22'
-          stable: true
+          go-version-file: 'go.mod'
 
       - uses: actions/checkout@v2
 
@@ -44,7 +42,7 @@ jobs:
     - uses: actions/checkout@v1
     - uses: actions/setup-go@v5
       with:
-        go-version: '1.22'
+        go-version-file: 'go.mod'
     - name: Install latest version of Kind
       run: |
         go get sigs.k8s.io/kind