chore: gitignore bootstrap file and minor cleanup of ci

.github/workflows/ci.yml

@@ -32,7 +32,7 @@ jobs:
       - run: |
           make generate
           if ! git diff --quiet README.md; then
-            echo "Please run `make generate`"
+            echo "Please run 'make generate'"
             git status --short
             git --no-pager diff README.md
             exit 1

.gitignore

@@ -1,2 +1,3 @@
 /tmp
 .vagrant
+bootstrap.sh