build: Ignore CI workflows for markdown files

Running all CI tests at pull requests for some files is sub-optimal.
For example, release PRs contains changes to a single file
`CHANGELOG.md`, and none of the tests executed in CI are affected
by that file.

By ignoring the tests for such files, we better utilise the CI resources
and decrease the time required to release changes.

Signed-off-by: Paulo Gomes <[email protected]>

.github/workflows/cifuzz.yaml

@@ -3,6 +3,10 @@ on:
   pull_request:
     branches:
       - main
+    paths-ignore:
+      - 'CHANGELOG.md'
+      - 'README.md'
+      - 'MAINTAINERS'
 
 permissions:
   contents: read

.github/workflows/e2e.yaml

@@ -2,6 +2,10 @@ name: e2e
 
 on:
   pull_request:
+    paths-ignore:
+      - 'CHANGELOG.md'
+      - 'README.md'
+      - 'MAINTAINERS'
   push:
     branches:
       - main

.github/workflows/tests.yaml

@@ -2,6 +2,11 @@ name: tests
 
 on:
   pull_request:
+    paths-ignore:
+      - 'CHANGELOG.md'
+      - 'README.md'
+      - 'MAINTAINERS'
+
   push:
     branches:
       - main

.github/workflows/verify.yaml

@@ -2,6 +2,11 @@ name: verify
 
 on:
   pull_request:
+    paths-ignore:
+      - 'CHANGELOG.md'
+      - 'README.md'
+      - 'MAINTAINERS'
+
   push:
     branches:
       - main