Update pr-tools.yml trigger to skip irrelevant changes

The tools workflow was triggering on every PR event, including changes
to markdown, CI YAML, and Docker files that can't affect tool
compilation or behavior.

Author: SeanTAllen

.github/workflows/pr-tools.yml

@@ -1,6 +1,15 @@
 name: Tools
 
-on: pull_request
+on:
+  pull_request:
+    types: [opened, synchronize, reopened, ready_for_review]
+    paths:
+      - '**'
+      - '!**/*.md'
+      - '!**/*.yml'
+      - '!.dockerfiles/**'
+      - '!.ci-dockerfiles/**'
+      - '.github/workflows/pr-tools.yml'
 
 concurrency:
   group: pr-tools-${{ github.ref }}