chore: CI and linter update

Update GitHub actions to latest versions.
Update golangci-lint to latest version + fix reported issue.

.github/actions/govulncheck/action.yml

@@ -11,7 +11,7 @@ inputs:
 runs:
   using: "composite"
   steps:
-    - uses: actions/setup-go@v5.0.0
+    - uses: actions/setup-go@v5
       with:
         go-version: ${{ inputs.go-version-input }}
         check-latest: false

.github/workflows/check.yml

@@ -9,15 +9,15 @@ jobs:
       - name: Get sources
         uses: actions/checkout@v4
 
-      - name: Set up Go 1.21
-        uses: actions/setup-go@v3
+      - name: Set up Go 1.23.3
+        uses: actions/setup-go@v5
         with:
-          go-version: '1.21'
+          go-version: '1.23.3'
 
-      - name: Run golsangci-lint
-        uses: golangci/golangci-lint-action@v3
+      - name: Run golangci-lint
+        uses: golangci/golangci-lint-action@v6
         with:
-          version: v1.57.2
+          version: v1.62.0
           args: --timeout=180s
           skip-cache: true
 
@@ -30,6 +30,6 @@ jobs:
       - name: Run govulncheck
         uses: ./.github/actions/govulncheck
         with:
-          go-version-input: 1.21
+          go-version-input: 1.23.3
           go-package: ./...
 

contact_types.go

@@ -263,7 +263,7 @@ func (c *Contact) SetSettings(kr *crypto.KeyRing, email string, cardType CardTyp
 	}
 
 	// KEY
-	if settings.Keys != nil && len(settings.Keys) > 0 {
+	if len(settings.Keys) > 0 {
 		var keys = ""
 		for i, key := range settings.Keys {
 			if i > 0 {