fix: attachHeadingsDescriptions match headings incorrectly

[Celend]

What/Why/How?

if headings have same prefix, the description will mess up, see below:

info:
  openapi: 3.1.0
  title: test
  version: v1
  description: |+
    # intro
    # modules
    ## user_module
    some text
   
    ## user
    some text2

then you can see:

how to fix?
just match heading to end of the line.

Reference

Testing

Check yourself

• Code is linted
• Tested
• All new/updated code is covered with tests

[Oprysk]

@Celend could you please attach the screenshots before and after fix?

[Oprysk]

@Celend I can't reproduce this issue. Maybe there is some specific configuration, with an example you've provided - all looks good.
If you have more details feel free to reopen this. Thanks!

[Celend]

@Oprysk This should be easy to reproduce, here is detail example.

good.yaml:

openapi: 3.1.0
info:
  title: test
  version: v1
  description: |+
    # intro
    # modules
    ## 1module
    some text
   
    ## 2module
    some text2

bad.yaml:

openapi: 3.1.0
info:
  title: test
  version: v1
  description: |+
    # intro
    # modules
    ## module1
    some text
   
    ## module
    some text2

reproduction:

$ npx redoc-cli --version
0.13.2
$ cat good.yaml
openapi: 3.1.0
info:
  title: test
  version: v1
  description: |+
    # intro
    # modules
    ## 1module
    some text

    ## 2module
    some text2
$ npx redoc-cli serve good.yaml
# see screenshot

$ cat bad.yaml
openapi: 3.1.0
info:
  title: test
  version: v1
  description: |+
    # intro
    # modules
    ## module1
    some text

    ## module
    some text2
$ npx redoc-cli serve bad.yaml
# see screenshot

good screenshot:

bad screenshot: