fix: ubuntu image install md5sum

Author: eryajf

.github/workflows/dist-to-release.yml

@@ -32,6 +32,8 @@ jobs:
           mv README.md LICENSE default.conf go-ldap-admin-ui
           mv dist go-ldap-admin-ui
           tar zcvf go-ldap-admin-ui-${{ env.GITHUB_REF_NAME }}.tar.gz go-ldap-admin-ui
+          sudo apt-get update
+          sudo apt-get install md5sum
           md5 go-ldap-admin-ui-${{ env.GITHUB_REF_NAME }}.tar.gz > go-ldap-admin-ui-${{ env.GITHUB_REF_NAME }}.tar.gz.md5
 
       - name: Upload release package