Change Arm Trademarks to the issue template

Change the Trademarks to the issue template document
diff --git a/.github/issue_template.md b/.github/issue_template.md
index 33f68fb..5e9d83d 100644
--- a/.github/issue_template.md
+++ b/.github/issue_template.md
@@ -8,7 +8,7 @@
 ## Bug
 
 **OS**  
-mbed-OS|linux|windows|
+Mbed OS|linux|windows|
 
 **mbed TLS build:**  
 Version: x.x.x or git commit id  
@@ -38,4 +38,4 @@
 
 ## Question
 
-**Please first check for answers in the [mbed TLS knowledge Base](https://tls.mbed.org/kb), and preferebly file an issue in the [mbed TLS support forum](https://tls.mbed.org/discussions)**  
+**Please first check for answers in the [Mbed TLS knowledge Base](https://tls.mbed.org/kb), and preferably file an issue in the [Mbed TLS support forum](https://tls.mbed.org/discussions)**