Pin typos to v1.10.2 and run on pushes to main (#1143)

Signed-off-by: Aaron Raimist <aaron@raim.ist>

.github/workflows/spell-check.yaml

@@ -1,5 +1,9 @@
 name: Spell Check
-on: [pull_request]
+on:
+  push:
+    branches:
+      - main
+  pull_request:
 
 jobs:
   run:
@@ -10,6 +14,6 @@ jobs:
       uses: actions/checkout@v2
 
     - name: Check spelling of proposals
-      uses: crate-ci/typos@master
+      uses: crate-ci/typos@9be36f97fdbe645ee9a12449fb13aca856c2516a
       with:
         config: ${{github.workspace}}/.github/_typos.toml