feat(renderer): support caret in links

[xcoulon]

Fixes #391

Signed-off-by: Xavier Coulon xcoulon@redhat.com

[github-actions]

Comparing with master branch:

name                                          old time/op    new time/op    delta
RealDocumentProcessing/demo.adoc-2              17.2ms ± 1%    17.3ms ± 5%    ~     (p=0.161 n=9+9)
RealDocumentProcessing/vertx-examples.adoc-2    48.2ms ± 0%    48.3ms ± 1%    ~     (p=0.515 n=8+10)
RealDocumentProcessing/mocking.adoc-2           49.2ms ± 4%    47.6ms ± 1%  -3.20%  (p=0.001 n=9+9)

name                                          old alloc/op   new alloc/op   delta
RealDocumentProcessing/demo.adoc-2              8.85MB ± 0%    8.85MB ± 0%  +0.00%  (p=0.017 n=10+9)
RealDocumentProcessing/vertx-examples.adoc-2    24.0MB ± 0%    24.0MB ± 0%    ~     (p=0.345 n=9+10)
RealDocumentProcessing/mocking.adoc-2           21.6MB ± 0%    21.6MB ± 0%    ~     (p=0.210 n=9+7)

name                                          old allocs/op  new allocs/op  delta
RealDocumentProcessing/demo.adoc-2                106k ± 0%      106k ± 0%    ~     (p=0.429 n=10+6)
RealDocumentProcessing/vertx-examples.adoc-2      305k ± 0%      305k ± 0%  -0.00%  (p=0.036 n=10+10)
RealDocumentProcessing/mocking.adoc-2             326k ± 0%      326k ± 0%    ~     (p=0.974 n=10+10)

Comparing with latest release:

name                                          old time/op    new time/op    delta
RealDocumentProcessing/demo.adoc-2              17.2ms ± 1%    17.1ms ± 2%  -0.88%  (p=0.006 n=9+9)
RealDocumentProcessing/vertx-examples.adoc-2    48.2ms ± 0%    48.5ms ± 1%  +0.57%  (p=0.011 n=8+9)
RealDocumentProcessing/mocking.adoc-2           49.2ms ± 4%    47.7ms ± 1%  -2.96%  (p=0.006 n=9+10)

name                                          old alloc/op   new alloc/op   delta
RealDocumentProcessing/demo.adoc-2              8.85MB ± 0%    8.85MB ± 0%    ~     (p=0.529 n=10+10)
RealDocumentProcessing/vertx-examples.adoc-2    24.0MB ± 0%    24.0MB ± 0%    ~     (p=0.315 n=9+10)
RealDocumentProcessing/mocking.adoc-2           21.6MB ± 0%    21.6MB ± 0%    ~     (p=1.000 n=9+9)

name                                          old allocs/op  new allocs/op  delta
RealDocumentProcessing/demo.adoc-2                106k ± 0%      106k ± 0%    ~     (p=0.973 n=10+10)
RealDocumentProcessing/vertx-examples.adoc-2      305k ± 0%      305k ± 0%    ~     (p=0.181 n=10+6)
RealDocumentProcessing/mocking.adoc-2             326k ± 0%      326k ± 0%    ~     (p=0.391 n=10+10)