⬆ Bump mxschmitt/action-tmate from 3.19 to 3.21

Bumps [mxschmitt/action-tmate](https://github.com/mxschmitt/action-tmate) from 3.19 to 3.21.
- [Release notes](https://github.com/mxschmitt/action-tmate/releases)
- [Changelog](https://github.com/mxschmitt/action-tmate/blob/master/RELEASE.md)
- [Commits](mxschmitt/action-tmate@v3.19...v3.21)

---
updated-dependencies:
- dependency-name: mxschmitt/action-tmate
  dependency-version: '3.21'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

.github/workflows/debug.yml

@@ -47,7 +47,7 @@ jobs:
         run: |
           sudo apt install emacs
       - name: Setup tmate session
-        uses: mxschmitt/action-tmate@v3.19
+        uses: mxschmitt/action-tmate@v3.21
         with:
           detached: true
         timeout-minutes: 60

.github/workflows/lint.yml

@@ -70,7 +70,7 @@ jobs:
           sudo apt install emacs
       - name: Setup tmate session
         if: ${{ github.event.inputs.debug == 'true' }}
-        uses: mxschmitt/action-tmate@v3.19
+        uses: mxschmitt/action-tmate@v3.21
         with:
           detached: true
         timeout-minutes: 60

.github/workflows/test.yml

@@ -133,7 +133,7 @@ jobs:
         sudo apt install emacs
     - name: Setup tmate session
       if: ${{ github.event.inputs.debug == 'true' }}
-      uses: mxschmitt/action-tmate@v3.19
+      uses: mxschmitt/action-tmate@v3.21
       with:
         detached: true
       timeout-minutes: 60
@@ -196,7 +196,7 @@ jobs:
           sudo apt install emacs
       - name: Setup tmate session
         if: ${{ github.event.inputs.debug == 'true' }}
-        uses: mxschmitt/action-tmate@v3.19
+        uses: mxschmitt/action-tmate@v3.21
         with:
           detached: true
         timeout-minutes: 60
@@ -284,7 +284,7 @@ jobs:
           sudo apt install emacs
       - name: Setup tmate session
         if: ${{ github.event.inputs.debug == 'true' }}
-        uses: mxschmitt/action-tmate@v3.19
+        uses: mxschmitt/action-tmate@v3.21
         with:
           detached: true
         timeout-minutes: 60
@@ -389,7 +389,7 @@ jobs:
           sudo apt install emacs
       - name: Setup tmate session
         if: ${{ github.event.inputs.debug == 'true' }}
-        uses: mxschmitt/action-tmate@v3.19
+        uses: mxschmitt/action-tmate@v3.21
         with:
           detached: true
         timeout-minutes: 60
@@ -490,7 +490,7 @@ jobs:
           sudo apt install emacs
       - name: Setup tmate session
         if: ${{ github.event.inputs.debug == 'true' }}
-        uses: mxschmitt/action-tmate@v3.19
+        uses: mxschmitt/action-tmate@v3.21
         with:
           detached: true
         timeout-minutes: 60
@@ -571,7 +571,7 @@ jobs:
         uses: rhysd/action-setup-vim@v1
       - name: Setup tmate session
         if: ${{ github.event.inputs.debug == 'true' }}
-        uses: mxschmitt/action-tmate@v3.19
+        uses: mxschmitt/action-tmate@v3.21
         with:
           detached: true
         timeout-minutes: 60
@@ -633,7 +633,7 @@ jobs:
           brew install emacs
       - name: Setup tmate session
         if: ${{ github.event.inputs.debug == 'true' }}
-        uses: mxschmitt/action-tmate@v3.19
+        uses: mxschmitt/action-tmate@v3.21
         with:
           detached: true
         timeout-minutes: 60