fix: path of dependencies

I forgot to fix this after the content of docs folder was moved to root
folder.

Signed-off-by: Vitor Mattos <vitor@php.rio>

Author: vitormattos

.github/workflows/deploy.yml

@@ -21,7 +21,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install -r "docs/requirements.txt"
+          pip install -r "requirements.txt"
 
       - name: Build Sphinx documentation
         run: |