Check for typos on CI (#2918)

* Check for typos on CI

* Fix all typos

.github/workflows/typos.yml

@@ -0,0 +1,17 @@
+# https://github.com/crate-ci/typos
+# Add exceptions to _typos.toml
+# install and run locally: cargo install typos-cli && typos
+
+name: Spell Check
+on: [pull_request]
+
+jobs:
+  run:
+    name: Spell Check
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Actions Repository
+        uses: actions/checkout@v2
+
+      - name: Check spelling of entire workspace
+        uses: crate-ci/typos@master