📒 Correcting a syntax error in the README (#2473)

* Update README.md

* 📝 docs: fix typo in some readme

.github/README.md

@@ -590,7 +590,7 @@ func main() {
     app := fiber.New(fiber.Config{
         EnableTrustedProxyCheck: true,
         TrustedProxies: []string{"0.0.0.0", "1.1.1.1/30"}, // IP address or IP address range
-        ProxyHeader: fiber.HeaderXForwardedFor},
+        ProxyHeader: fiber.HeaderXForwardedFor,
     })
 
     // ...

.github/README_az.md

@@ -589,7 +589,7 @@ func main() {
     app := fiber.New(fiber.Config{
         EnableTrustedProxyCheck: true,
         TrustedProxies: []string{"0.0.0.0", "1.1.1.1/30"}, // IP address or IP address range
-        ProxyHeader: fiber.HeaderXForwardedFor},
+        ProxyHeader: fiber.HeaderXForwardedFor,
     })
 
     // ...

.github/README_ckb.md

@@ -589,7 +589,7 @@ func main() {
     app := fiber.New(fiber.Config{
         EnableTrustedProxyCheck: true,
         TrustedProxies: []string{"0.0.0.0", "1.1.1.1/30"}, // IP address or IP address range
-        ProxyHeader: fiber.HeaderXForwardedFor},
+        ProxyHeader: fiber.HeaderXForwardedFor,
     })
 
     // ...

.github/README_it.md

@@ -585,7 +585,7 @@ func main() {
     app := fiber.New(fiber.Config{
         EnableTrustedProxyCheck: true,
         TrustedProxies: []string{"0.0.0.0", "1.1.1.1/30"}, // IP address or IP address range
-        ProxyHeader: fiber.HeaderXForwardedFor},
+        ProxyHeader: fiber.HeaderXForwardedFor,
     })
 
     // ...

.github/README_uk.md

@@ -594,7 +594,7 @@ func main() {
     app := fiber.New(fiber.Config{
         EnableTrustedProxyCheck: true,
         TrustedProxies: []string{"0.0.0.0", "1.1.1.1/30"}, // IP address or IP address range
-        ProxyHeader: fiber.HeaderXForwardedFor},
+        ProxyHeader: fiber.HeaderXForwardedFor,
     })
 
     // ...

.github/README_zh-TW.md

@@ -598,7 +598,7 @@ func main() {
     app := fiber.New(fiber.Config{
         EnableTrustedProxyCheck: true,
         TrustedProxies: []string{"0.0.0.0", "1.1.1.1/30"}, // IP 地址或 IP 地址區間
-        ProxyHeader: fiber.HeaderXForwardedFor},
+        ProxyHeader: fiber.HeaderXForwardedFor,
     })
 
     // ...