docs: add bash to the markdown code blocks

README.md

@@ -2,13 +2,13 @@
 
 ## alt images
 To build `alt` images, run:
-```
+```bash
 ./build.py -o alt
 ```
 
 ## k8s images
 To build `k8s` images for branch `p10` and push to repository `test_k8s`, run:
-```
+```bash
 ./build.py -o k8s -b p10 --overwrite-organization test_k8s --tasks tasks.json --tags tags.json
 ```
 
@@ -21,7 +21,7 @@ Or create directory and copy `distroless-example.toml` to it, rename file to
 ### build
 For example if created image alt/distroless-false and you want to push to
 the organization `<ORGANIZATION>`, run:
-```
+```bash
 ./build.py -i alt/distroless-false --overwrite-organization <ORGANIZATION>
 ```
 If you push to the users repository, then organiztion is your username.