Bump composer from 2.0.7 to 2.0.8 (#203)

Bumps composer from 2.0.7 to 2.0.8.

Signed-off-by: dependabot[bot] <[email protected]>

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

Author: dependabot[bot]

Dockerfile

@@ -27,7 +27,7 @@ WORKDIR /opt/kimai
 RUN rm -r tests
 
 # composer base image
-FROM composer:2.0.7 AS composer
+FROM composer:2.0.8 AS composer
 
 
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