Use dev_suffix instead of tag_suffix

Author: hsbt

.github/workflows/nightly.yml

@@ -26,8 +26,9 @@ jobs:
       ubuntu_version: ${{ matrix.os }}
       ruby_version: master
       image_version_suffix: ${{ matrix.debug }}
-      tag_suffix: ${{ matrix.dev }}
+      tag_suffix: ''
       push_tags: ''
+      dev_suffix: ${{ matrix.dev }}
       optflags: ''
       cppflags: ''
       debugflags: ''
@@ -46,7 +47,7 @@ jobs:
       with:
         ruby_version: "${{ env.ruby_version }}"
         nightly: "${{ env.nightly }}"
-        image_version_suffix: "${{ env.image_version_suffix }}${{ env.tag_suffix }}"
+        image_version_suffix: "${{ env.image_version_suffix }}${{ env.dev_suffix }}"
         ubuntu_version: "${{ env.ubuntu_version }}"
         tag_suffix: "${{ env.tag_suffix }}"
         target: ${{ env.target }}
@@ -56,7 +57,7 @@ jobs:
       with:
         ruby_version: "${{ env.ruby_version }}"
         nightly: "${{ env.nightly }}"
-        image_version_suffix: "${{ env.image_version_suffix }}${{ env.tag_suffix }}"
+        image_version_suffix: "${{ env.image_version_suffix }}${{ env.dev_suffix }}"
         ubuntu_version: "${{ env.ubuntu_version }}"
         tag_suffix: "${{ env.tag_suffix }}"