Fix publish actions

Author: BigBang1112

.github/workflows/publish-gbxnetpak.yml

@@ -15,6 +15,7 @@ jobs:
       uses: actions/setup-dotnet@v1
       with:
         dotnet-version: |
+          8.0.x
           7.0.x
           6.0.x
           3.1.x

.github/workflows/publish-manually.yml

@@ -17,6 +17,7 @@ jobs:
       uses: actions/setup-dotnet@v1
       with:
         dotnet-version: |
+          8.0.x
           7.0.x
           6.0.x
           3.1.x

.github/workflows/publish-pre.yml

@@ -19,6 +19,7 @@ jobs:
       uses: actions/setup-dotnet@v1
       with:
         dotnet-version: |
+          8.0.x
           7.0.202
           6.0.x
           3.1.x

.github/workflows/publish.yml

@@ -20,6 +20,7 @@ jobs:
       uses: actions/setup-dotnet@v1
       with:
         dotnet-version: |
+          8.0.x
           7.0.202
           6.0.x
           3.1.x