Fix some broken links from CI scans (#9495)

* Fix some broken links from CI scans

Follow-up of https://github.com/FreshRSS/FreshRSS/pull/9209 and https://github.com/FreshRSS/FreshRSS/pull/9207.

See: https://github.com/FreshRSS/FreshRSS/pull/9209#issuecomment-6383267668

* Apply some selected redirects

* Escape . properly

.github/workflows/tests.yml

@@ -17,7 +17,7 @@ jobs:
 
   tests:
     name: tests
-    # https://github.com/actions/virtual-environments
+    # https://github.com/actions/runner-images
     runs-on: ubuntu-26.04
 
     steps:
@@ -105,7 +105,6 @@ jobs:
       run: GOBIN=${PWD}/bin/ go install mvdan.cc/sh/v3/cmd/shfmt@v3.8.0
 
     - name: Check shell script syntax
-      # shellcheck is pre-installed https://github.com/actions/virtual-environments/blob/main/images/linux/Ubuntu2204-Readme.md
       run: ./tests/shellchecks.sh
 
     - name: Install hadolint