checkout tags and get write perms

.github/workflows/swift.yml

@@ -12,6 +12,8 @@ on:
 jobs:
   build:
     runs-on: macos-latest
+    permissions:
+      contents: write
     steps:
     - uses: actions/checkout@v4
       with:
@@ -24,6 +26,7 @@ jobs:
     - uses: actions/checkout@v4
       with:
         path: getargv-swift
+        fetch-tags: true
     - uses: swift-actions/setup-swift@v1
       with:
         swift-version: 5.9
@@ -46,7 +49,7 @@ jobs:
         if-no-files-found: error
     - name: Bump Version
       id: bump_version
-      run: echo "new_version=$(git tag | sort -V | tail -1 | awk -F. 'BEGIN { OFS = "." } {$NF+=1; print $0}')" >> $GITHUB_OUTPUT
+      run: git tag | sort -V | tail -1 | awk -F. 'BEGIN { OFS = "." } {$NF+=1; print $0}' | xargs -I {} echo "new_version={}" >> $GITHUB_OUTPUT
       working-directory: getargv-swift
     - name: create && push tag
       run: |