Add Octopus Deploy plugin to Marketplace

Signed-off-by: Jonathan Mezach <jonathan.mezach@rr-wfm.com>

microsite/data/plugins/octopus-deploy.yaml

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+---
+title: 'Octopus Deploy'
+author: jmezach
+authorUrl: https://jmezach.github.io/
+category: CI/CD
+description: Easily view your Octopus Deploy releases within the Software Catalog
+documentation: https://github.com/backstage/backstage/blob/master/plugins/octopus-deploy/README.md
+iconUrl: img/octopus-deploy.svg
+npmPackageName: '@backstage/plugin-octopus-deploy'
+addedDate: '2023-02-24'

microsite/static/img/octopus-deploy.svg

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+<svg id="Logos" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 140 140"><defs><style>.cls-1{fill:#fff;}</style></defs><path class="cls-1" d="M19.13 103.13c9.35-6 20.33-16.34 16.16-28.5C33 68 29.87 62.33 29.45 55.17a43.84 43.84 0 0 1 2.66-17.83C40.49 14.85 65.4 4.2 87.92 11c20.85 6.26 35.2 30.48 26.56 51.58-5 12.18-7.22 21.58 3.9 31.05 3 2.57 10.33 6.42 10.31 11 0 6-11.74-1.27-13-2.31 1.49 2.6 16.24 18 6.85 19.08-8.64 1-16.27-11.06-21.47-16.25-8.72-8.7-7.21 10.55-7.25 14.53-.06 6.28-4.5 19-12.46 10.72-6.58-6.84-4.09-17.76-8.66-25.36-5-8.33-13.34 8.33-15.42 11.37-2.33 3.4-14 19.89-18.59 11.1-3.76-7.13 2.25-18.3 5.2-24.75-1.08 2.34-8.71 5.8-10.94 6.93-5 2.54-10.15 4.05-15.82 3.65-11.73-.84-2.73-7.07 2-10.15z"/></svg>