[skia-dev] Match only *.md for hashtag content scripts

Bug: skia:9612
Change-Id: I9bee9eeeb1c637bf925a6a06d0efb894d5901ae7
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/253938
Reviewed-by: Ravi Mistry <rmistry@google.com>
Commit-Queue: Ravi Mistry <rmistry@google.com>
diff --git a/chromeextensions/skia-dev/manifest.json b/chromeextensions/skia-dev/manifest.json
index e83e059..4400f01 100644
--- a/chromeextensions/skia-dev/manifest.json
+++ b/chromeextensions/skia-dev/manifest.json
@@ -1,6 +1,6 @@
 {
    "name": "Assorted Tools for Skia Developers",
-   "version": "3.7",
+   "version": "3.8",
    "description": "Assorted Tools for Skia Developers.",
    "permissions": [
      "notifications",
@@ -28,7 +28,7 @@
    },
    "content_scripts": [
     {
-      "matches": ["*://skia.googlesource.com/*", "*://github.com/google/skia*"],
+      "matches": ["*://skia.googlesource.com/*.md", "*://github.com/google/skia*.md"],
       "js": ["hashtag.js"],
       "run_at": "document_end"
     }