[Doc][v0.18.0] Fix documentation formatting and improve code examples (#8701)

### What this PR does / why we need it?
This PR fixes various documentation issues and improves code examples
throughout the project.

Signed-off-by: MrZ20 <2609716663@qq.com>

tests/e2e/nightly/single_node/models/scripts/GUIDE_AND_TEMPLATE.md

@@ -239,7 +239,7 @@ test_cases:
       <<: *envs
     server_cmd: *server_cmd
     benchmarks:
-      <<: *benchmarks_acc
+      <<: *benchmarks
 ```
 
 #### EPD / Disaggregated Case