Bump mamba-org/setup-micromamba from 1 to 2

Bumps [mamba-org/setup-micromamba](https://github.com/mamba-org/setup-micromamba) from 1 to 2.
- [Release notes](https://github.com/mamba-org/setup-micromamba/releases)
- [Commits](mamba-org/setup-micromamba@v1...v2)

---
updated-dependencies:
- dependency-name: mamba-org/setup-micromamba
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/cache.yml

@@ -72,7 +72,7 @@ jobs:
           path: ${{ env.CRDS_PATH }}/**/jwst*
           key: test-cache-${{ needs.contexts.outputs.jwst }}
       - if: steps.lookup-combined-cache.outputs.cache-hit != 'true'
-        uses: mamba-org/setup-micromamba@v1
+        uses: mamba-org/setup-micromamba@v2
         with:
           environment-name: crds-testing
           create-args: >-

.github/workflows/ci.yml

@@ -50,7 +50,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
-      - uses: mamba-org/setup-micromamba@v1
+      - uses: mamba-org/setup-micromamba@v2
         with:
           environment-name: crds-testing
           create-args: >-