ci: don't trigger build and e2e workflows on docs-only pull requests

Signed-off-by: Justin Chadwell <me@jedevc.com>

.github/workflows/build.yml

@@ -16,6 +16,9 @@ on:
     branches:
       - 'master'
       - 'v[0-9]*'
+    paths-ignore:
+      - 'README.md'
+      - 'docs/**'
 
 env:
   REPO_SLUG: "docker/buildx-bin"

.github/workflows/e2e.yml

@@ -14,6 +14,9 @@ on:
     branches:
       - 'master'
       - 'v[0-9]*'
+    paths-ignore:
+      - 'README.md'
+      - 'docs/**'
 
 jobs:
   build: