Adding canonical links to spec docs

[excentrickristy]

As discussed here: https://github.com/jakartaee/specifications/issues/582

Here is my first batch of additions to jakarta.ee/src/static/_headers

/specifications/platform/10/jakarta-platform-spec-10.0.html Link: https://jakarta.ee/specifications/platform/10/jakarta-platform-spec-10.0; rel="canonical"

/specifications/platform/10/jakarta-platform-spec-10.0 Link: https://jakarta.ee/specifications/platform/10/jakarta-platform-spec-10.0; rel="canonical"

/specifications/webprofile/10/jakarta-webprofile-spec-10.0 Link: https://jakarta.ee/specifications/webprofile/10/jakarta-webprofile-spec-10.0; rel="canonical"

/specifications/webprofile/10/jakarta-webprofile-spec-10.0.html Link: https://jakarta.ee/specifications/webprofile/10/jakarta-webprofile-spec-10.0; rel="canonical"

/specifications/coreprofile/10/jakarta-coreprofile-spec-10.0 Link: https://jakarta.ee/specifications/coreprofile/10/jakarta-coreprofile-spec-10.0; rel="canonical"

/specifications/coreprofile/10/jakarta-coreprofile-spec-10.0.html Link: https://jakarta.ee/specifications/coreprofile/10/jakarta-coreprofile-spec-10.0; rel="canonical"

/specifications/authorization/2.1/jakarta-authorization-spec-2.1 Link: https://jakarta.ee/specifications/authorization/2.1/jakarta-authorization-spec-2.1; rel="canonical"

/specifications/authorization/2.1/jakarta-authorization-spec-2.1.html Link: https://jakarta.ee/specifications/authorization/2.1/jakarta-authorization-spec-2.1; rel="canonical"

/specifications/batch/2.1/jakarta-batch-spec-2.1 Link: https://jakarta.ee/specifications/batch/2.1/jakarta-batch-spec-2.1; rel="canonical"

/specifications/batch/2.1/jakarta-batch-spec-2.1.html Link: https://jakarta.ee/specifications/batch/2.1/jakarta-batch-spec-2.1; rel="canonical"