chore(release): update install manifest [skip ci]

Author: github-actions[bot]

scripts/release.env

@@ -7,6 +7,6 @@
 # APPIMAGE_RELEASE_URL     - latest stable Linux x64 AppImage
 # APPIMAGE_PRE_RELEASE_URL - latest prerelease Linux x64 AppImage
 RELEASE_URL=
-PRE_RELEASE_URL=https://github.com/ModifAmorphic/darktide-modificus-curator/releases/download/v0.30.2/curator-v0.30.2-linux-x64.tar.gz
+PRE_RELEASE_URL=https://github.com/ModifAmorphic/darktide-modificus-curator/releases/download/v0.30.3/curator-v0.30.3-linux-x64.tar.gz
 APPIMAGE_RELEASE_URL=
-APPIMAGE_PRE_RELEASE_URL=https://github.com/ModifAmorphic/darktide-modificus-curator/releases/download/v0.30.2/ModificusCurator-linux-x64.AppImage
+APPIMAGE_PRE_RELEASE_URL=https://github.com/ModifAmorphic/darktide-modificus-curator/releases/download/v0.30.3/ModificusCurator-linux-x64.AppImage