changed fragments to .sh extension

fragments/labels/calibre.sh

@@ -0,0 +1,8 @@
+calibre)
+    # credit: Drew Diver (@grumpydrew on MacAdmins Slack)
+    name="calibre"
+    type="dmg"
+    downloadURL="https://calibre-ebook.com/dist/osx"
+    appNewVersion=$( curl -fsIL "${downloadURL}" | grep -i "^location" | awk '{print $2}' | sed -E 's/.*\/[a-zA-Z]*-([0-9.]*)\..*/\1/g' )
+    expectedTeamID="NTY7FVCEKP"
+    ;;