docs: add language identifier console to code blocks

https://docs.github.com/en/get-started/writing-on-github/working-with-advanced-formatting/creating-and-highlighting-code-blocks
d7799da826/lib/linguist/languages.yml (L6063)

contributing/pull_request.md

@@ -43,13 +43,13 @@ as the existing code and ensures that the codebase will be as readable as possib
 
 You can fix most of the coding style violations by running this command in your terminal:
 
-```
+```console
 > composer cs-fix
 ```
 
 You can check the coding style violations:
 
-```
+```console
 > composer cs
 ```
 
@@ -198,19 +198,19 @@ so that you can fix whatever errors that pop up with your submission.
 
 PHPStan is expected to scan the entire framework by running this command in your terminal:
 
-```
+```console
 > vendor/bin/phpstan analyse
 ```
 
 Rector, on the other hand, can be run on the specific files you modified or added:
 
-```
+```console
 > vendor/bin/rector process --dry-run path/to/file
 ```
 
 If you run it without `--dry-run`, Rector will fix the code:
 
-```
+```console
 > vendor/bin/rector process path/to/file
 ```