Update to latest release of GitReleaseManager

Author: JoeRobich

.github/workflows/close-milestone.yml

@@ -24,7 +24,7 @@ jobs:
       - name: Install GitReleaseManager
         uses: gittools/actions/gitreleasemanager/setup@v0.10.2
         with:
-          versionSpec: '0.11.x'
+          versionSpec: '0.15.x'
 
       - name: Use GitVersion
         id: gitversion

.github/workflows/update-milestone.yml

@@ -33,7 +33,7 @@ jobs:
         if: ${{ github.event.action == 'opened' }}
         uses: gittools/actions/gitreleasemanager/setup@v0.10.2
         with:
-          versionSpec: '0.11.x'
+          versionSpec: '0.15.x'
 
       - name: Use GitVersion
         if: ${{ github.event.action == 'opened' }}