GHA/linux: bump pizlonator/fil-c to v0.680, fixup quoting

Also put the version number in quotes to avoid GHA altering the number
into `0.68` (without rightmost zero) and ending up storing that in the
`FIL_C_VERSION` env.

Hopefully Renovate will honor this on future bumps.

Do the same for the rest of `x.y` format version numbers.

Fixing:
```
env:
[...]
    FIL_C_VERSION: 0.68
```
Ref: https://github.com/curl/curl/actions/runs/28006009260/job/82920767558?pr=22142#step:5:16

Fixes #22142

Closes #22143

.github/workflows/linux.yml

@@ -39,7 +39,7 @@ env:
   # renovate: datasource=github-tags depName=google/boringssl versioning=semver registryUrl=https://github.com
   BORINGSSL_VERSION: 0.20260616.0
   # renovate: datasource=github-releases depName=pizlonator/fil-c versioning=semver-coerced registryUrl=https://github.com
-  FIL_C_VERSION: 0.679
+  FIL_C_VERSION: '0.680'
   # renovate: datasource=github-tags depName=libressl/portable versioning=semver registryUrl=https://github.com
   LIBRESSL_VERSION: 4.3.2
   # renovate: datasource=github-tags depName=Mbed-TLS/mbedtls versioning=semver registryUrl=https://github.com

.github/workflows/non-native.yml

@@ -196,7 +196,7 @@ jobs:
     env:
       MAKEFLAGS: -j 5
       MATRIX_BUILD: '${{ matrix.build }}'
-      AMISSL_VERSION: 5.27
+      AMISSL_VERSION: '5.27'
       AMISSL_SHA256: 5003bef8c5930354d16b0ce7196d71b2811891c42fad38a9238c5ce4098ad42a
       TOOLCHAIN_VERSION: 6.5.0
       TOOLCHAIN_SHA256: 381e227c9ef552f073771d6f851cfdf873b574f3cf5db7c1c0107ea5d7146edc
@@ -412,7 +412,7 @@ jobs:
       MAKEFLAGS: -j 5
       MATRIX_BUILD: '${{ matrix.build }}'
       # renovate: datasource=github-releases depName=andrewwutw/build-djgpp versioning=semver-coerced registryUrl=https://github.com
-      TOOLCHAIN_VERSION: 3.4
+      TOOLCHAIN_VERSION: '3.4'
       TOOLCHAIN_SHA256: 8464f17017d6ab1b2bb2df4ed82357b5bf692e6e2b7fee37e315638f3d505f00
     strategy:
       matrix:

.github/workflows/windows.yml

@@ -39,7 +39,7 @@ env:
   OPENSSH_WINDOWS_VERSION: 10.0.0.0p2-Preview
   OPENSSH_WINDOWS_SHA256_ARM64: 698c6aec31c1dd0fb996206e8741f4531a97355686b5431ef347d531b07fcd42
   OPENSSH_WINDOWS_SHA256_WIN64: 23f50f3458c4c5d0b12217c6a5ddfde0137210a30fa870e98b29827f7b43aba5
-  STUNNEL_VERSION: 5.78
+  STUNNEL_VERSION: '5.78'
   STUNNEL_SHA256: 32a88dcc5654f955266109be8bf10fd7d56fa4e125cab821ee508230570e46c5
 
 jobs: