chore(deps): update otel/weaver docker tag to v0.20.0 (#2522)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

ibm-mq-metrics/weaver.Dockerfile

@@ -3,4 +3,4 @@
 # Dependabot can keep this file up to date with latest containers.
 
 # Weaver is used to generate markdown docs, and enforce policies on the model and run integration tests.
-FROM otel/weaver:v0.19.0@sha256:3d20814cef548f1d31f27f054fb4cd6a05125641a9f7cc29fc7eb234e8052cd9 AS weaver
+FROM otel/weaver:v0.20.0@sha256:fa4f1c6954ecea78ab1a4e865bd6f5b4aaba80c1896f9f4a11e2c361d04e197e AS weaver