fix: variable name

Signed-off-by: jmeridth <[email protected]>

Author: jmeridth

docs/major-version-updater.md

@@ -8,7 +8,7 @@
     contents: write
   with:
     # Tag name that the major tag will point to (e.g. v1.2.3)
-    tag_name: true
+    tag-name: true
   secrets:
     # The GitHub token to use
     github-token: ${{ secrets.GITHUB_TOKEN }}