Add news posts about release

[SchrodingersGat]

• News post about 0.12.0 release (old)
• News post about 0.12.1 release (new)

[netlify[bot]]

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[SchrodingersGat]

@matmair trying to use your {% link %} tag but without any success - any tips here/

[matmair]

@SchrodingersGat small syntax error, it works now

[SchrodingersGat]

Thanks!