[skip ci] actions: Add info/automate cache resetting

.github/workflows/beta.yml

@@ -69,6 +69,7 @@ jobs:
           prerelease: true
           files: SideStore.ipa
           body: |
+            <!-- NOTE: to reset SideSource cache, go to `https://apps.sidestore.io/reset-cache/nightly/<sidesource key>`. This is not included in the GitHub Action since it makes draft releases so they can be edited and have a changelog. -->
             Beta builds are hand-picked builds from development commits that will allow you to try out new features earlier than normal. However, **they might contain bugs and other issues. Use at your own risk!**
 
             ## Changelog

.github/workflows/nightly.yml

@@ -89,3 +89,6 @@ jobs:
             Built at (UTC date): `${{ steps.date_altstore.outputs.date }}`
             Commit SHA: `${{ github.sha }}`
             Version: `${{ steps.version.outputs.version }}`
+
+      - name: Reset cache for apps.sidestore.io/nightly
+        run: sleep 10 && curl https://apps.sidestore.io/reset-cache/nightly/${{ secrets.SIDESOURCE_KEY }}

.github/workflows/stable.yml

@@ -68,6 +68,7 @@ jobs:
           draft: true
           files: SideStore.ipa
           body: |
+            <!-- NOTE: to reset SideSource cache, go to `https://apps.sidestore.io/reset-cache/nightly/<sidesource key>`. This is not included in the GitHub Action since it makes draft releases so they can be edited and have a changelog. -->
             ## Changelog
             
             - TODO