Fix tag_name variable

It shouldn't be exported to child processes

.github/workflows/appimage-release.yml

@@ -598,8 +598,6 @@ jobs:
       - name: AppImage build.
         if: env.ONLY_CACHE == 'false'
         shell: bash
-        env:
-          tag_name: ${{ github.event.client_payload.options.display_version }}
         run: |
           # Let appimagetool determine the repository
           cd $REPO_NAME
@@ -610,6 +608,7 @@ jobs:
           -exclude-libs=libatk-1.0.so.0,libatk-bridge-2.0.so.0,libatspi.so.0,libcairo-gobject.so.2,libcairo.so.2,libgdk-3.so.0,libgdk-x11-2.0.so.0,libgmodule-2.0.so.0,libgtk-3.so.0,libgtk-x11-2.0.so.0,libpixman-1.so.0,libpng12.so.0 \
           -extra-plugins=bearer,iconengines,imageformats,platforminputcontexts,platforms/libqwayland-egl.so,platforms/libqwayland-generic.so,platformthemes/libqgtk3.so,platformthemes/libqxdgdesktopportal.so,styles/libkvantum.so,wayland-decoration-client,wayland-graphics-integration-client,wayland-shell-integration
 
+          tag_name=${{ github.event.client_payload.options.display_version }}
           version=${tag_name#k}
           version=${version//-[[:digit:]]*/}
           appimage_name=$(echo Kotatogram_Desktop*.AppImage)

.github/workflows/mac-release.yml

@@ -253,6 +253,7 @@ jobs:
           macdeployqt Kotatogram.app
           codesign --remove-signature Kotatogram.app
 
+          tag_name=${{ github.event.client_payload.options.display_version }}
           version=${tag_name#k}
           version=${version//-[[:digit:]]*/}
           artifact_name=$version.dmg