Update electrs to 49a71805a2 and rust to 1.75.0 (#483)

Author: philippem

Dockerfile.deps

@@ -65,12 +65,12 @@ RUN curl -sL -o elements.tar.gz "https://github.com/ElementsProject/elements/rel
  && mv /srv/explorer/liquid/bin/{elements-cli,liquid-cli} \
  && rm elements.tar.gz
 
-RUN curl https://sh.rustup.rs -sSf | sh -s -- -y --default-toolchain 1.65.0
+RUN curl https://sh.rustup.rs -sSf | sh -s -- -y --default-toolchain 1.75.0
 RUN source /root/.cargo/env \
  && mkdir -p /srv/explorer/electrs{,_liquid} \
  && git clone --no-checkout https://github.com/blockstream/electrs.git \
  && (cd electrs \
- && git checkout fd35014283c7d3a7a85c77b9fd647c9f09de12c9 \
+ && git checkout 49a71805a2c15852a4fa0450bcb5a4a4a36c89d8 \
  && cp contrib/popular-scripts.txt /srv/explorer \
  && cargo install --root /srv/explorer/electrs_bitcoin --locked --path . --features electrum-discovery \
  && cargo install --root /srv/explorer/electrs_liquid --locked --path . --features electrum-discovery,liquid \