[FIX]: solidity CI bug (#1698)

### Description

This commit fixes #1697 - excludes solidty from doc build

### Issue Link 

#1697 

### Type of change

- [x] Bug fix (non-breaking change which fixes an issue)

### Contents

- Exclude solidty in doc build

### How Has This Been Tested?

Running `cargo doc --no-deps --workspace --exclude integration-tests
`

cc: @ChihChengLiang

Signed-off-by: Shikhar Vashistha <[email protected]>

Author: shikharvashistha

.github/workflows/github-pages.yml

@@ -33,7 +33,7 @@ jobs:
       # Create a index.html outside of the subdirectories for requirement of GitHub pages
       - name: Generate Docs
         run: |
-          cargo doc --no-deps
+          cargo doc --no-deps --workspace --exclude integration-tests
           echo "<meta http-equiv=\"refresh\" content=\"0; url=zkevm_circuits\">" > target/doc/index.html
       # Archive the artifact with the correct permissions
       # https://github.com/actions/deploy-pages/issues/188