[ci] Fix auto-update JMX scraper version

[rogercoll]

What happened?

Incorrect value for the pinned sha256, see: https://github.com/open-telemetry/opentelemetry-collector-contrib/pull/41863/files

Version is not populated correctly in the curl command: https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/.github/workflows/auto-update-jmx-component.yml#L195

$ curl -L https://repo1.maven.org/maven2/io/opentelemetry/contrib/opentelemetry-jmx-scraper/$version/opentelemetry-jmx-scraper-ANYTHING.jar | sha256sum | cut -d ' ' -f 1 
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   554  100   554    0     0   2944      0 --:--:-- --:--:-- --:--:--  2962
e791ccfcfee9c0d299d07474d9bfcbfcbebf1181323be601220c8a823062ab99

Collector version

v0.131.0

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