build(deps): bump iffy/install-nim from 5.0.8 to 5.0.9

Bumps [iffy/install-nim](https://github.com/iffy/install-nim) from 5.0.8 to 5.0.9.
- [Release notes](https://github.com/iffy/install-nim/releases)
- [Changelog](https://github.com/iffy/install-nim/blob/master/CHANGELOG.md)
- [Commits](iffy/install-nim@25e9ede...28af9cd)

---
updated-dependencies:
- dependency-name: iffy/install-nim
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/build.yml

@@ -54,7 +54,7 @@ jobs:
         run: ./.github/bin/linux-install-musl
 
       - name: Install Nim
-        uses: iffy/install-nim@25e9ede26d630a40bb8ecb9ce75479e281e717bf
+        uses: iffy/install-nim@28af9cddcdc5e5da655da4ff631b86bd87585a5b
         with:
           version: "binary:2.0.8"
         env:
@@ -99,7 +99,7 @@ jobs:
         uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332
 
       - name: Install Nim
-        uses: iffy/install-nim@25e9ede26d630a40bb8ecb9ce75479e281e717bf
+        uses: iffy/install-nim@28af9cddcdc5e5da655da4ff631b86bd87585a5b
         with:
           version: "binary:2.0.8"
         env:

.github/workflows/tests.yml

@@ -47,7 +47,7 @@ jobs:
         run: ./.github/bin/linux-install-musl
 
       - name: Install Nim
-        uses: iffy/install-nim@25e9ede26d630a40bb8ecb9ce75479e281e717bf
+        uses: iffy/install-nim@28af9cddcdc5e5da655da4ff631b86bd87585a5b
         with:
           version: "binary:2.0.8"
         env: