Add curl zip to the manifest

Author: anarsoul

flatpak/io.github.softfever.OrcaSlicer.yml

@@ -195,6 +195,12 @@ modules:
         dest: external-packages/GMP
         sha256: eae9326beb4158c386e39a356818031bd28f3124cf915f8c5b1dc4c7a36b4d7c
 
+      # curl
+      - type: file
+        url: https://github.com/curl/curl/archive/refs/tags/curl-7_75_0.zip
+        dest: external-packages/CURL
+        sha256: a63ae025bb0a14f119e73250f2c923f4bf89aa93b8d4fafa4a9f5353a96a765a
+
       # MPFR
       - type: file
         url: https://www.mpfr.org/mpfr-4.2.2/mpfr-4.2.2.tar.bz2