CI: Pin actions/upload-artifact and peter-evans/slash-command-dispatch to the latest tag (#3431)

Author: seisman

.github/workflows/cache_data.yaml

@@ -76,9 +76,10 @@ jobs:
 
       # Upload the downloaded files as artifacts to GitHub
       - name: Upload artifacts to GitHub
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v4.4.0
         with:
           name: gmt-cache
+          include-hidden-files: true
           path: |
             ~/.gmt/cache
             ~/.gmt/server

.github/workflows/ci_tests.yaml

@@ -161,7 +161,7 @@ jobs:
 
       # Upload diff images on test failure
       - name: Upload diff images if any test fails
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v4.4.0
         if: failure()
         with:
           name: artifact-${{ runner.os }}-${{ matrix.python-version }}

.github/workflows/ci_tests_dev.yaml

@@ -179,7 +179,7 @@ jobs:
 
       # Upload diff images on test failure
       - name: Upload diff images if any test fails
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v4.4.0
         if: ${{ failure() }}
         with:
           name: artifact-GMT-${{ matrix.gmt_git_ref }}-${{ runner.os }}

.github/workflows/slash-command-dispatch.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Slash Command Dispatch
-        uses: peter-evans/slash-command-dispatch@v4
+        uses: peter-evans/slash-command-dispatch@v4.0.0
         with:
           token: ${{ github.token }}
           commands: |