Update golangci/golangci-lint-action action to v8 (#103)

* Update golangci/golangci-lint-action action to v8

* fix ST1005: error strings should not be capitalized

* fix : QF1003: could use tagged switch on r.Method

* fix: QF1012: Use fmt.Fprintf(...) instead of Write([]byte(fmt.Sprintf(...)))

---------

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: fkwp <github-fkwp@w4ve.de>

main.go

@@ -52,7 +52,7 @@ func exchangeOIDCToken(
 	ctx context.Context, token OpenIDTokenType, skipVerifyTLS bool,
 ) (*fclient.UserInfo, error) {
 	if token.AccessToken == "" || token.MatrixServerName == "" {
-		return nil, errors.New("Missing parameters in OIDC token")
+		return nil, errors.New("missing parameters in OIDC token")
 	}
 
 	if skipVerifyTLS {
@@ -68,7 +68,7 @@ func exchangeOIDCToken(
 	)
 	if err != nil {
 		log.Printf("Failed to look up user info: %v", err)
-		return nil, errors.New("Failed to look up user info")
+		return nil, errors.New("failed to look up user info")
 	}
 	return &userinfo, nil
 }
@@ -93,10 +93,11 @@ func (h *Handler) handle(w http.ResponseWriter, r *http.Request) {
 	w.Header().Set("Access-Control-Allow-Headers", "Accept, Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token")
 
 	// Handle preflight request (CORS)
-	if r.Method == "OPTIONS" {
+	switch r.Method {
+	case "OPTIONS":
 		w.WriteHeader(http.StatusOK)
 		return
-	} else if r.Method == "POST" {
+	case "POST":
 		var sfu_access_request SFURequest
 		err := json.NewDecoder(r.Body).Decode(&sfu_access_request)
 		if err != nil {
@@ -163,7 +164,7 @@ func (h *Handler) handle(w http.ResponseWriter, r *http.Request) {
 		if err != nil {
 			log.Printf("failed to encode json response! %v", err)
 		}
-	} else {
+	default:
 		w.WriteHeader(http.StatusMethodNotAllowed)
 	}
 }