more spelling error fixes

Author: abiradarti

examples/lighting-app/cc13x4_26x4/README.md

@@ -209,7 +209,7 @@ Getting Started Guide][matter-e2e-faq].
 Commission the light device onto the Matter network. Run the following command
 on the CHIP tool:
 
-````
+```
 
 ./chip-tool pairing ble-thread <nodeID - e.g. 1>
 hex:<complete dataset from starting the OTBR> 20202021 3840
@@ -301,5 +301,4 @@ Additionally, we welcome any feedback.
     https://www.ti.com/wireless-connectivity/thread/design-development.html
 [ot_border_router_setup]: https://openthread.io/guides/border-router/build
 [uniflash]: https://www.ti.com/tool/download/UNIFLASH
-```
-````
+

examples/lock-app/cc13x4_26x4/README.md

@@ -57,7 +57,7 @@ guide assumes that the environment is linux based, and recommends Ubuntu 20.04.
 -   Download and install [SysConfig][sysconfig]. This can be done simply with
     the following commands.
 
-````
+```
  $ cd ~
  $ wget https://dr-download.ti.com/software-development/ide-configuration-compiler-or-debugger/MD-nsUM6f7Vvb/1.18.1.3343/sysconfig-1.18.1_3343-setup.run
  $ chmod +x sysconfig-1.18.1_3343-setup.run
@@ -213,7 +213,7 @@ Getting Started Guide][matter-e2e-faq].
 Commission the device onto the Matter network. Run the following command on the
 CHIP tool:
 
-````
+```
 
 ./chip-tool pairing ble-thread <nodeID - e.g. 1>
 hex:<complete dataset from starting the OTBR> 20202021 3840

examples/shell/cc13x2x7_26x2x7/README.md

@@ -14,7 +14,7 @@ guide assumes that the environment is linux based, and recommends Ubuntu 20.04.
 -   Download and install [SysConfig][sysconfig]. This can be done simply with
     the following commands.
 
-````
+```
   $ cd ~
   $ wget https://dr-download.ti.com/software-development/ide-configuration-compiler-or-debugger/MD-nsUM6f7Vvb/1.18.1.3343/sysconfig-1.18.1_3343-setup.run
   $ chmod +x sysconfig-1.18.1_3343-setup.run
@@ -180,4 +180,4 @@ Additionally, we welcome any feedback.
   https://www.ti.com/wireless-connectivity/thread/design-development.html
 [ot_border_router_setup]: https://openthread.io/guides/border-router/build
 [uniflash]: https://www.ti.com/tool/download/UNIFLASH
-````
+