Update checkout action version in linting workflow (#223)

Author: jackspiering

.github/workflows/linting.yml

@@ -27,7 +27,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Clone this repo
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Markdown Linting Action
         id: lint

README.md

@@ -208,7 +208,7 @@ See `CONTRIBUTING.md` for guidance on adding services with the template, documen
 
 ## Star History
 
-[![Star History Chart](https://api.star-history.com/svg?repos=2tiny2scale/scaletail&type=Date)](https://www.star-history.com/#2tiny2scale/scaletail&Date)
+[![Star History Chart](https://api.star-history.com/svg?repos=tailscale-dev/scaletail&type=Date)](https://www.star-history.com/#tailscale-dev/scaletail&Date)
 
 ## License