ci: fix doc deploy action (#507)

Fix for simple mkdocs deploy action. I'll likely rewrite this if I add versioning, which I probably will.

.github/workflows/docs.yml

@@ -23,5 +23,6 @@ jobs:
           python-version: 3.x
       - run: pip install mkdocs-material
       - run: pip install mdx_truly_sane_lists
-      - run: cd docs/
-      - run: mkdocs gh-deploy --force
+      - run: |
+          cd docs/
+          mkdocs gh-deploy --force

README.md

@@ -226,7 +226,7 @@ The release binaries are packaged with shell auto-completion files for bash, fis
 
 You can run bottom using `btm`.
 
-For help on flags, use `btm -h` for a quick overview or `btm --help` for more details.
+For help on flags, use `btm -h` for a quick overview or `btm --help` for more details. You can find more information on usage in the [documentation](https://clementtsang.github.io/bottom/).
 
 ## Configuration