Bump mamba-org/setup-micromamba from 1.7.0 to 1.7.3 (#2903)

Bumps [mamba-org/setup-micromamba](https://github.com/mamba-org/setup-micromamba) from 1.7.0 to 1.7.3.
- [Release notes](https://github.com/mamba-org/setup-micromamba/releases)
- [Commits](mamba-org/setup-micromamba@v1.7.0...v1.7.3)

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

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

Author: dependabot[bot]

.github/workflows/cache_data.yaml

@@ -35,7 +35,7 @@ jobs:
 
       # Install Micromamba with conda-forge dependencies
       - name: Setup Micromamba
-        uses: mamba-org/[email protected].0
+        uses: mamba-org/[email protected].3
         with:
           environment-name: pygmt
           condarc: |

.github/workflows/ci_docs.yml

@@ -65,7 +65,7 @@ jobs:
 
       # Install Micromamba with conda-forge dependencies
       - name: Setup Micromamba
-        uses: mamba-org/[email protected].0
+        uses: mamba-org/[email protected].3
         with:
           environment-name: pygmt
           condarc: |

.github/workflows/ci_doctests.yaml

@@ -40,7 +40,7 @@ jobs:
 
       # Install Micromamba with conda-forge dependencies
       - name: Setup Micromamba
-        uses: mamba-org/[email protected].0
+        uses: mamba-org/[email protected].3
         with:
           environment-name: pygmt
           condarc: |

.github/workflows/ci_tests.yaml

@@ -94,7 +94,7 @@ jobs:
 
       # Install Micromamba with conda-forge dependencies
       - name: Setup Micromamba
-        uses: mamba-org/[email protected].0
+        uses: mamba-org/[email protected].3
         with:
           environment-name: pygmt
           condarc: |

.github/workflows/ci_tests_dev.yaml

@@ -88,7 +88,7 @@ jobs:
 
       # Install Micromamba with conda-forge dependencies
       - name: Setup Micromamba
-        uses: mamba-org/[email protected].0
+        uses: mamba-org/[email protected].3
         with:
           environment-name: pygmt
           condarc: |

.github/workflows/ci_tests_legacy.yaml

@@ -52,7 +52,7 @@ jobs:
 
       # Install Micromamba with conda-forge dependencies
       - name: Setup Micromamba
-        uses: mamba-org/[email protected].0
+        uses: mamba-org/[email protected].3
         with:
           environment-name: pygmt
           condarc: |