gha: limit release workflow by file name

Author: joemiller

.github/workflows/ci.yaml

@@ -24,15 +24,25 @@ jobs:
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
         with:
           fetch-depth: 0
+          fetch-tags: true
 
-      - name: fetch tags
-        run: git fetch --force --tags
+      # only generate a new release if certain files change:
+      - uses: dorny/paths-filter@v2
+        id: filter
+        with:
+          filters: |
+            app:
+              - 'action.yaml'
+              - '**.sh'
+              - 'Dockerfile'
 
       - name: install autotag binary
+        if: steps.filter.outputs.app == 'true'
         run: |
           curl -sL https://git.io/autotag-install | sudo sh -s -- -b /usr/local/bin
 
       - name: increment tag and create release
+        if: steps.filter.outputs.app == 'true'
         run: |
           set -eou pipefail