More specific exclusions in the `examples` folder. (#14347)

This PR changes how we skip java UT and ITs with changes in the examples folder. After this change, any Markdown files within the examples folder and jupyter-notebooks directory will be excluded. The rationale behind these more specific exclusions is that some ITs use json files checked in examples, so we want to trigger the full workflow for all other changes.
diff --git a/.github/workflows/unit-and-integration-tests-unified.yml b/.github/workflows/unit-and-integration-tests-unified.yml
index 2cd9726..ff963da 100644
--- a/.github/workflows/unit-and-integration-tests-unified.yml
+++ b/.github/workflows/unit-and-integration-tests-unified.yml
@@ -20,7 +20,7 @@
       - '**/*.md'
       - 'dev/**'
       - 'docs/**'
-      - 'examples/**'
+      - 'examples/**/jupyter-notebooks/**'
       - 'helm/**'
       - 'web-console/**'
       - 'website/**'
@@ -33,7 +33,7 @@
       - '**/*.md'
       - 'dev/**'
       - 'docs/**'
-      - 'examples/**'
+      - 'examples/**/jupyter-notebooks/**'
       - 'helm/**'
       - 'web-console/**'
       - 'website/**'