Fix code highlighting

content/en/python-lifehacks/how-to-easily-write-linux-cli-tool.md

@@ -47,7 +47,7 @@ my-cli-tool kernel
 ```
 
 You will see output like this:
-```plaintext
+```
 ❯ my-cli-tool kernel
 Kernel version: 6.2.2-060202-generic
 ```
@@ -58,7 +58,7 @@ This will automatically generate a help page, which can be called using the `--h
 my-cli-tool --help
 ```
 You will get this output:
-```plaintext
+```
 NAME
      my-cli-tool - A CLI tool for getting system information about Linux server
 
@@ -104,7 +104,7 @@ Now we can type the following command:
 my-cli-tool kernel --format short
 ```
 Output:
-```plaintext
+```
 6.2.2
 ```
 This will also automatically update the help page, adding the `--format` flag and its possible values:
@@ -112,7 +112,7 @@ This will also automatically update the help page, adding the `--format` flag an
 my-cli-tool kernel --help
 ```
 Output:
-```plaintext
+```
 NAME
     my-cli-tool kernel - A method for getting kernel version
 

content/en/python-lifehacks/how-to-load-multiple-web-pages-in-parallel-using-python.md

@@ -47,7 +47,7 @@ Now you can run main.py file with the command:
 python3 main.py
 ```
 You will see this output:
-```plaintext
+```
 200
 {
 	"args": {