Bump github-action-markdown-link-check to 1.0.15

The current version is old and has a bug which causes false positives
for links with percent encoding.

Signed-off-by: Johanan Liebermann <[email protected]>

Author: johananl

.github/workflows/pr-md-link-check.yaml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # tag=v4.2.2
-    - uses: gaurav-nelson/github-action-markdown-link-check@5c5dfc0ac2e225883c0e5f03a85311ec2830d368 # tag=v1
+    - uses: gaurav-nelson/github-action-markdown-link-check@d53a906aa6b22b8979d33bc86170567e619495ec # tag=1.0.15
       with:
         use-quiet-mode: 'yes'
         config-file: .markdownlinkcheck.json

.github/workflows/weekly-md-link-check.yaml

@@ -20,7 +20,7 @@ jobs:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # tag=v4.2.2
         with:
           ref: ${{ matrix.branch }}
-      - uses: gaurav-nelson/github-action-markdown-link-check@5c5dfc0ac2e225883c0e5f03a85311ec2830d368 # tag=v1
+      - uses: gaurav-nelson/github-action-markdown-link-check@d53a906aa6b22b8979d33bc86170567e619495ec # tag=1.0.15
         with:
           use-quiet-mode: 'yes'
           config-file: .markdownlinkcheck.json