fix(mise): disable GitHub cache save to prevent wasteful uploads

The mise-action has two cache options:
- cache: false (don't restore from cache)
- cache_save: true (default - still save to cache)

With only `cache: false`, mise was still uploading ~800MB caches
to GitHub Actions cache on every run, creating duplicate entries
per ref that are never restored (since cache: false).

This adds `cache_save: false` to all workflows using mise with
`cache: false`, preventing wasteful cache uploads.

Affected workflows:
- _checks-expo.yaml
- _checks-links.yaml
- _checks-playwright.yaml
- _checks-rs.yaml
- _checks-ts.yaml
- _gen_proto.yaml
- _publish-npm.yaml
- _pulumi-wif.yaml

Note: Projects using S3/sccache for caching don't benefit from
GitHub Actions cache for mise, making these uploads pure waste.

Author: jleni

.github/workflows/_checks-expo.yaml

@@ -154,6 +154,7 @@ jobs:
         with:
           install: true
           cache: false
+          cache_save: false
 
       - name: Detect package manager
         id: pm

.github/workflows/_checks-links.yaml

@@ -111,6 +111,7 @@ jobs:
         with:
           install: true
           cache: false
+          cache_save: false
 
       - name: Run ci_postinstall
         run: |

.github/workflows/_checks-playwright.yaml

@@ -337,6 +337,7 @@ jobs:
         with:
           install: true
           cache: false
+          cache_save: false
           working_directory: ${{ inputs.working_directory }}
 
       - name: Detect package manager

.github/workflows/_checks-rs.yaml

@@ -283,6 +283,7 @@ jobs:
         with:
           install: true
           cache: false
+          cache_save: false
           working_directory: ${{ inputs.package_path }}
 
       - name: Run ci_postinstall

.github/workflows/_checks-ts.yaml

@@ -202,6 +202,7 @@ jobs:
         with:
           install: true
           cache: false
+          cache_save: false
 
       - name: Detect package manager
         id: pm

.github/workflows/_gen_proto.yaml

@@ -55,6 +55,7 @@ jobs:
         with:
           install: true
           cache: false
+          cache_save: false
 
       - name: Run ci_postinstall
         run: |

.github/workflows/_publish-npm.yaml

@@ -63,6 +63,7 @@ jobs:
         with:
           install: true
           cache: false
+          cache_save: false
 
       - name: Run ci_postinstall
         run: |

.github/workflows/_pulumi-wif.yaml

@@ -125,6 +125,7 @@ jobs:
         with:
           install: true
           cache: false
+          cache_save: false
 
       - name: Run ci_postinstall
         run: |