chore: Update changelog automation to use GitHub token and enhance error messaging

Signed-off-by: Harshit Kushwaha <find.harshitkushwaha@gmail.com>

Author: harshitt13

.chloggen/pr-2837.yaml

@@ -0,0 +1,6 @@
+change_type: enhancement
+component: 
+note: Automate changelog generation using fragment pattern
+issues: [2787]
+subtext: 
+change_logs: [user]

.github/workflows/changelog-fragment.yml

@@ -23,7 +23,7 @@ jobs:
         with:
           repository: ${{ github.event.pull_request.head.repo.full_name }}
           ref: ${{ github.head_ref }}
-          token: ${{ secrets.OPENTELEMETRYBOT_GITHUB_TOKEN || secrets.GITHUB_TOKEN }}
+          token: ${{ github.token }}
           fetch-depth: 0
 
       - name: Install yq
@@ -143,7 +143,7 @@ jobs:
         with:
           repository: ${{ github.event.pull_request.head.repo.full_name }}
           ref: ${{ github.head_ref }}
-          token: ${{ secrets.OPENTELEMETRYBOT_GITHUB_TOKEN || secrets.GITHUB_TOKEN }}
+          token: ${{ github.token }}
           fetch-depth: 0
 
       - name: Check skip conditions
@@ -180,7 +180,9 @@ jobs:
           fragment=".chloggen/pr-${PR_NUMBER}.yaml"
 
           if [[ ! -f "$fragment" ]]; then
-            echo "missing changelog fragment: $fragment"
+            echo "❌ Missing changelog fragment: $fragment"
+            echo "If you are contributing from a fork, you must create this file manually."
+            echo "Copy the contents of .chloggen/TEMPLATE.yaml into a new file named $fragment, fill it out, and commit it to your branch."
             exit 1
           fi
 

.github/workflows/draft-release-changelog.yml

@@ -34,7 +34,9 @@ jobs:
         run: $(go env GOPATH)/bin/chloggen update --dry
 
       - name: Compile changelog
-        run: $(go env GOPATH)/bin/chloggen update --version ${{ inputs.version }}
+        env:
+          VERSION: ${{ inputs.version }}
+        run: $(go env GOPATH)/bin/chloggen update --version "$VERSION"
 
       - name: Create PR for Release Captain review
         uses: peter-evans/create-pull-request@v6