Bump actions/checkout from 4 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/cargo_clippy_lib.yml

@@ -6,7 +6,7 @@ jobs:
   clippy_check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - run: |
           
           rustup toolchain install nightly
@@ -22,7 +22,7 @@ jobs:
   # test-clang: 
   #   runs-on: ubuntu-latest
   #   steps:
-  #     - uses: actions/checkout@v4
+  #     - uses: actions/checkout@v6
   #     - name: setup rust
   #       uses: dtolnay/rust-toolchain@stable
   #     - name: test
@@ -32,7 +32,7 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: setup rust
         uses: dtolnay/rust-toolchain@stable
       - name: test

.github/workflows/cargo_fmt.yml

@@ -9,7 +9,7 @@ jobs:
   cargo_fmt:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
     - name: Set up rust
       uses: actions-rs/toolchain@v1
       with:

.github/workflows/chanelog.yaml

@@ -8,7 +8,7 @@ jobs:
     name: Test the git-cliff changelog generator action
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - name: Generate a changelog

.github/workflows/msrv.yml

@@ -14,12 +14,12 @@ jobs:
       fail-fast: false
     container: mendelrubin/cargo-msrv:latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: remove Cargo.toml so cargo-msrv doesn't find it
         run: |
           rm Cargo.toml
           ls -l
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Get MSRV and create badge
 
         id: get-msrv

.github/workflows/release_all.yaml

@@ -15,7 +15,7 @@ jobs:
         crate: [git_function_history, git-function-history-gui, cargo-function-history, function_history_backend_thread, git_function_history-proc-macro, function-grep]
       fail-fast: false
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: setup rust
         uses: dtolnay/rust-toolchain@stable
       - run: |