ghactions: setup-go: Use go version from go.mod

This commit changes uses of actions/setup-go to pick the go version
required in go.mod.
This means we'll be using the same go version everywhere, and since
there is no major version hardcoded (such as '1.20.x'), this means we
don't need to remember to update it once in a while.

Signed-off-by: Christophe Fergeau <[email protected]>

.github/workflows/go.yml

@@ -52,7 +52,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v5
       with:
-        go-version: 1.20.x
+        go-version-file: 'go.mod'
 
     - name: Test
       run: make test
@@ -72,12 +72,12 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v5
       with:
-        go-version: 1.20.x
+        go-version-file: 'go.mod'
 
-    - name: Build 
+    - name: Build
       run: make win-sshproxy
 
-    - name: Test 
+    - name: Test
       run: go test -v .\test-win-sshproxy
 
 

.github/workflows/golangci-lint.yml

@@ -11,11 +11,10 @@ jobs:
     name: lint
     runs-on: ubuntu-latest
     steps:
+      - uses: actions/checkout@v4
       - name: Set up Go
         uses: actions/setup-go@v5
         with:
-          go-version: 1.20.x
-
-      - uses: actions/checkout@v4
+          go-version-file: 'go.mod'
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v6

.github/workflows/release.yml

@@ -25,6 +25,8 @@ jobs:
 
     - name: Set up Go
       uses: actions/setup-go@v5
+      with:
+        go-version-file: 'go.mod'
 
     - name: Build
       run: |