Rename mkdocs workflow, add dependabot for pip, relocate requirements.txt

.github/dependabot.yml

@@ -5,3 +5,9 @@ updates:
     schedule:
       interval: daily
     open-pull-requests-limit: 10
+
+  - package-ecosystem: pip
+    directory: "/"
+    schedule:
+      interval: daily
+    open-pull-requests-limit: 10

.github/workflows/deploy.yml

@@ -1,4 +1,4 @@
-name: Publish docs via GitHub Pages
+name: Deploy docs to GitHub Pages via mkdocs
 
 on:
   push:
@@ -6,18 +6,13 @@ on:
       - master
 
 jobs:
-  build:
+  deploy:
     name: Deploy docs
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2.3.4
-        with:
-          fetch-depth: 0
-
       - uses: actions/setup-python@v2.2.1
         with:
           python-version: 3.x
-
-      - run: pip install -r requirements.txt
-
+      - run: pip install -r docs/requirements.txt
       - run: mkdocs gh-deploy --force