Bump matrixdotorg/synapse from v1.116.0 to v1.118.0 (#6)

Bumps matrixdotorg/synapse from v1.116.0 to v1.118.0.

---
updated-dependencies:
- dependency-name: matrixdotorg/synapse
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Dockerfile

@@ -1,4 +1,4 @@
-FROM docker.io/matrixdotorg/synapse:v1.116.0
+FROM docker.io/matrixdotorg/synapse:v1.118.0
 
 LABEL org.opencontainers.image.source=https://github.com/SeaGL/matrix-synapse-dev-image
 LABEL org.opencontainers.image.description="Developer environment-optimized Matrix Synapse image"