Update Github Actions branch reference to 0.0.103

Author: TheBlueMatt

.github/workflows/build.yml

@@ -35,7 +35,7 @@ jobs:
           cd ..
           git clone https://github.com/lightningdevkit/ldk-c-bindings
           cd ldk-c-bindings
-          git checkout 0.0.102
+          git checkout 0.0.103
       - name: Rebuild C bindings without STD for WASM
         run: |
           cd ldk-c-bindings
@@ -161,7 +161,7 @@ jobs:
           cd ..
           git clone https://github.com/lightningdevkit/ldk-c-bindings
           cd ldk-c-bindings
-          git checkout 0.0.102
+          git checkout 0.0.103
       - name: Checkout Android AAR binaries and artifacts
         run: |
           # Gitweb only allows snapshots of folders by providing the object hash, which we have to extract:
@@ -243,7 +243,7 @@ jobs:
           cd ..
           git clone https://github.com/lightningdevkit/ldk-c-bindings
           cd ldk-c-bindings
-          git checkout 0.0.102
+          git checkout 0.0.103
       - name: Rebuild C bindings with upstream clang, and check the sample app builds + links
         run: |
           cd ldk-c-bindings