chore(deps): update dependency traccar/traccar to v6.8.1

| datasource      | package         | from  | to    |
| --------------- | --------------- | ----- | ----- |
| github-releases | traccar/traccar | 6.7.3 | 6.8.1 |

Dockerfile

@@ -4,7 +4,7 @@ RUN mkdir -p /app/code
 WORKDIR /app/code
 
 # renovate: datasource=github-releases depName=traccar/traccar versioning=regex:^(?<major>\d+)\.(?<minor>\d+)\.?(?<patch>\d+)?$ extractVersion=^v(?<version>.+)$
-ARG TRACCAR_VERSION=6.7.3
+ARG TRACCAR_VERSION=6.8.1
 
 RUN wget https://github.com/traccar/traccar/releases/download/v${TRACCAR_VERSION}/traccar-linux-64-${TRACCAR_VERSION}.zip -O traccar.zip && \
     unzip traccar.zip && \