docs: correct syntax of canary setMirrorRoute's value

[S0n98]

Fix wrong syntax of
spec.strategy.canary.steps[setMirrorRoute].match.path.regex and spec.strategy.canary.steps[setMirrorRoute].match.path.prefix

Checklist:

• Either (a) I've created an enhancement proposal and discussed it with the community, (b) this is a bug fix, or (c) this is a chore.
• The title of the PR is (a) conventional with a list of types and scopes found here, (b) states what changed, and (c) suffixes the related issues number. E.g. "fix(controller): Updates such and such. Fixes #1234".
• I've signed my commits with DCO
• I have written unit and/or e2e tests for my change. PRs without these are unlikely to be merged.
• My builds are green. Try syncing with master if they are not.
• My organization is added to USERS.md.

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information

[github-actions]

E2E Tests Published Test Results

    2 files      2 suites   1h 41m 23s ⏱️
  89 tests   80 ✔️ 3 💤 6 ❌
186 runs  172 ✔️ 6 💤 8 ❌

For more details on these failures, see this check.

Results for commit c552fdc.

♻️ This comment has been updated with latest results.

[github-actions]

Go Published Test Results

1 798 tests   1 798 ✔️  2m 31s ⏱️
   102 suites         0 💤
       1 files           0 ❌

Results for commit c552fdc.

[codecov]

Codecov Report

Base: 81.55% // Head: 81.55% // No change to project coverage 👍

Coverage data is based on head (c552fdc) compared to base (8987009).
Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2431   +/-   ##
=======================================
  Coverage   81.55%   81.55%           
=======================================
  Files         124      124           
  Lines       18931    18931           
=======================================
  Hits        15439    15439           
  Misses       2702     2702           
  Partials      790      790           

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