minor #885 Add upgrade notes for v2.12 (chalasr)
minor #885 Add upgrade notes for v2.12 (chalasr)

This PR was merged into the 2.x branch.

Discussion
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Add upgrade notes for v2.12

/cc `@zolex` - as suggested.

Commits
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93f0f03 Add upgrade notes for v2.12

lexik/LexikJWTAuthenticationBundle