Bump mamba-org/setup-micromamba from 2 to 3 (#1585)

Bumps [mamba-org/setup-micromamba](https://github.com/mamba-org/setup-micromamba) from 2 to 3.
- [Release notes](https://github.com/mamba-org/setup-micromamba/releases)
- [Commits](mamba-org/setup-micromamba@v2...v3)

---
updated-dependencies:
- dependency-name: mamba-org/setup-micromamba
  dependency-version: '3'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/build_docs.yaml

@@ -21,7 +21,7 @@ jobs:
           persist-credentials: false
 
       - name: Setup Conda
-        uses: mamba-org/setup-micromamba@v2
+        uses: mamba-org/setup-micromamba@v3
         with:
           init-shell: bash
           environment-name: docs

.github/workflows/release.yaml

@@ -26,7 +26,7 @@ jobs:
       - uses: actions/checkout@v6
 
       - name: Setup Conda
-        uses: mamba-org/setup-micromamba@v2
+        uses: mamba-org/setup-micromamba@v3
         with:
           init-shell: bash
           environment-name: sdist_env

.github/workflows/tests.yaml

@@ -119,7 +119,7 @@ jobs:
       - uses: actions/checkout@v6
 
       - name: Setup Conda
-        uses: mamba-org/setup-micromamba@v2
+        uses: mamba-org/setup-micromamba@v3
         with:
           # https://github.com/mamba-org/setup-micromamba/issues/225
           micromamba-version: 1.5.10-0