Linux: Install libcurl4-openssl-dev before building.

.github/workflows/main.yml

@@ -15,7 +15,8 @@ jobs:
                                           libxfixes-dev libxi-dev libxinerama-dev libxxf86vm-dev libxss-dev \
                                           libgl1-mesa-dev libdbus-1-dev libudev-dev libgles2-mesa-dev \
                                           libegl1-mesa-dev libibus-1.0-dev fcitx-libs-dev libsamplerate0-dev \
-                                          libsndio-dev libwayland-dev libxkbcommon-dev libdrm-dev libgbm-dev
+                                          libsndio-dev libwayland-dev libxkbcommon-dev libdrm-dev libgbm-dev \
+                                          libcurl4-openssl-dev
     - name: Checkout love-appimage-source
       uses: actions/checkout@v3
       with: