Fix some relative paths

Author: jorgensd

_config.yml

@@ -3,7 +3,7 @@
 
 title: Example FEniCS paper
 author: Henrik Finsberg
-logo: "logo.png"
+logo: "docs/logo.png"
 copyright: "2022"
 
 # Force re-execution of notebooks on each build.
@@ -14,9 +14,7 @@ execute:
 # Information about where the book exists on the web
 repository:
   url: https://github.com/scientificcomputing/example-paper-fenics # Online location of your book
-  path_to_book: _sources # Optional path to your book, relative to the repository root
-  branch: gh-pages  # Which branch of the repository should be used when creating links (optional)
-
+ 
 launch_buttons:
   notebook_interface: "jupyterlab" # The interface interactive links will activate ["classic", "jupyterlab"]
   binderhub_url: "https://mybinder.org"
@@ -34,7 +32,7 @@ parse:
 
 sphinx:
   config:
-    bibtex_bibfiles: ["refs.bib"]
+    bibtex_bibfiles: ["docs/refs.bib"]
     suppress_warnings: ["bibtex.duplicate_citation"] # If the same paper is cited in multiple files
 
   extra_extensions: